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Heavenly Revenge [Male Reader version]

Summary:

Getting unfairly fired from his job is the last straw for you, a sweet, caring person who's done nothing to deserve the harsh treatment everyone seems so happy to inflict on you.
Your unconscious yearning for revenge attracts a demon's attention, and having nothing to lose anymore, you just might give in to his oh so appealing offer.

AMAB male identifying reader.

Chapter 1: 0 - Contractus

Summary:

After what might be the worst day of your life, a demon shows up unannonced in your living room, and he's got a very tempting offer for you.
[Contractus: contract]

Notes:

Hello everyone! Welcome to this story :)

This is an alternate version of an already existing story of mine by the same name, except this version features a male AMAB reader instead of a fem AFAB reader. The storyline will be the same, and the main differences will be the sex scenes and some dialogue. I've written only female reader inserts so far, so I wanted to spread the love so more people could get a piece of everyone's favorite incel bastard :)
Main inspiration for this fic was a super neat Halloween-themed official artwork done by Rokuro Saito, featuring Adachi as a demon!! (and Sho and Yu but they're not in this story).

As always, I'm open to constructive criticism (especially in this case, because writing sex scenes from a male reader perspective is entirely new for me) so don't hesitate if you have things to suggest!

Without further ado, here is the first chapter! Enjoy! :)

(See the end of the chapter for more notes.)

Chapter Text

Your faithful pillow does its best to muffle your anguished, rage-filled and throat-wrenching screams, but even it is unable to completely silence your raw anger and soul-crushing despair. Your tears and your spit drench its fabric as you keep pressing your face against it, and you’re on the verge on suffocating, fury and anguish making it harder and harder to breathe against the now moist pillow.

“FUCK !!!” you yell as you send the pillow flying across the room.

It crashes against your bookshelf, knocking a few trinkets down in the process – thankfully, nothing gets broken. Not that you would notice, in your current state; you’ve moved on to the other cushion resting on your bed, this time opting to pummel the poor pillow over and over as you mentally replace its uniform, blue hue by your boss’ face.

Well, technically speaking, Osamu Fukuda is not your boss anymore. He’s fired you earlier in the day, which is the main reason of your current distress. The bastard made an entire show of the whole thing, too, making sure every single one of your coworkers saw you heading to his office after he called you over the intercom. Not that people wouldn’t have noticed if you had suddenly stopped showing up to work, even without Fukuda’s theatrics.

Thanks to your sick, corrupt, narcissistic asshole of a boss, everyone at the national firm’s branch you work – worked – at is convinced you’re a perpetually horny manwhore. Or maybe they don’t believe it, they just behave like they do, because it’s what Fukuda wants and it’s convenient for everyone. Just because you’ve refused to have sex with him a few weeks ago, he’s decided to make your life at the workplace a living hell.

Sure, he hadn’t insisted when you had refused to take the hotel key he had handed you one evening before you went home. He had even been surprisingly nice about it, waving you goodbye with a cheerful smile. That had been… surprising, to say the least: branch director at only thirty-one years old, smart, rich, charismatic and handsome, Osamu Fukuda wasn’t used to taking “no” for an answer.

A few days after, your doubts had sadly been confirmed. Rumors had started to circulate around the office, depicting you as some sort of incubus that tried to sleep with everyone he could, some people even whispering you had tried to bed Fukuda to get a promotion. Of course, none of that was true, and there wasn’t a single person in that building that could have, in good faith, said you had propositioned them.

But people were bored, people enjoyed juicy gossip, and people didn’t bother fact-checking rumors. You had been forced to endure increasingly mocking and disgusted glares and reactions, and it had all culminated in your interview with Fukuda himself earlier today.
His acting had been perfect, to the point you doubted anyone could have seen through the pitiful, moralizing mask he kept on the whole time as he explained that he simply couldn’t allow you to work there if you were going to disrupt the workplace so much. But you knew better, you saw past his disappointed head shakes, his sad sighs, the weariness in his tone as he asked you to take your leave, the way he had handed you a paper tissue – that you had made a point not to take – when you had broken down in tears.

And now, here you are, jobless and with a dreadful reputation that would follow you to your next workplace, all because you had the audacity to refuse a man’s sexual advances.
It makes you sick to your stomach, bile rises in your throat, and you spit angrily on the ground.

“FUCK!!!” you scream again, punching the wall – and regretting it immediately after.

You shake your fist a little, before deciding that maybe, getting drunk sounds like a good idea right now. It won’t help, but at least, you can pretend everything’s better for a little while. You’re almost sure there’s a few cans of beer and a bottle of wine somewhere in your kitchen, so after one last kick to the pillow you’ve thrown earlier, you leave your bedroom.

As you walk in the corridor leading to the kitchen, there’s an uncharacteristic heaviness to your step. You’re not a particularly carefree person, but you like to think of yourself as an optimistic who always tries to do the best of any given situation. But it would be hard to tell so by looking at you right now, with the way you practically drag yourself to the kitchen, shoulders sagging, hair messy, eyes puffy and red, clothes crumpled and chest heaving with hiccups.

“This is so unfair!” you whine as you step inside your living room.

It’s far from being the first time that exact thought has crossed your mind today, but it helps, even if just by a little, to say it out loud. You’ve always struggled with expressing your more negative feelings, even when you’re on your own; but today, you just can’t be bothered to care anymore, all pretenses of being a cheerful person having been crushed under the weight of your firing.

“This is so fucking unfair!” you repeat, louder and stomping an angry foot on the parqueted floor, right before you open the kitchen’s door.

But just as you’re about to press down on the door’ handle, a strange sound coming from behind you catches your attention, loud and unpleasant, that reminds you of the buzzing noise of the static on a television screen. Taking a deep breath – you’re really, really not in the mood for dealing with a capricious appliance – you briefly pinch the bridge of your nose, before turning around and heading to the television.

But you don’t make it all the way there: before you can reach the screen, something slithers out of it. Your throat burns painfully as yet another scream tears it apart, although this time, it has nothing to do with anger and everything to do with the fear that seizes you when a vaguely human shape fully emerges from it and turns towards you.

The first thing that you notice on the intruder is his eyes – twin golden irises, that almost seem to glimmer in your living room’s low light. There’s something mischievous sparkling in them, but there’s also a more dangerous light flickering right beneath, which perfectly matches the lazy, predatory grin the stranger offers you.

He takes a confident step towards you, his perfectly fitted black suit clinging beautifully to his slender body. It’s a stark contrast with his alabaster skin, and although the suit’s cut is old-fashioned and elegant, the man himself carries himself with a lazy nonchalance you wouldn’t really associate with such a dignified appearance.

“Who- what are you?!” you scream, raising your fists defensively at the intruder, whose smirk only grows larger at your clear distress.
“Calm down, I’m not here to hurt you.” his voice, you find, perfectly matches his appearance: tranquil, but with a hint of something darker lingering within. “My name is Tohru Adachi, and I’m a demon.” he states, with an outrageous casualness.
“A demon, huh…” you breathe out as the man in front of you keeps smiling at you, his bright yellow eyes never leaving you.

That would explain the horns protruding on his forehead, the long tail slowly swishing behind him or the large wings he’s spread out, as if to fill your small living room with his presence as much as possible. The only hole in that theory is that, well, as far as you’re concerned, demons don’t fucking exist, and right now, you’re definitely not in the mood to deal with such a massive blow to your understanding of reality.

There’s a long moment of silence, none of you letting your eyes move away from the other. There’s a malicious spark in Adachi’s golden irises, as if he’s finding you very amusing, and that thought infuriates you. You’ve just been royally fucked over by a gigantic asshole who relishes in treating you and your coworkers like toys he can play with and break at will, and the idea of someone else, demon or not, trying to treat you the same way makes your blood boil.

“Listen.” you sigh, your fists clenching painfully as you take a step towards Adachi, “I don’t care if you’re a demon or some psycho who thought it would be funny to break inside my home to try to scare me. I don’t care if this is a prank, a dream, a drunk hallucination or just me having gone nuts. Just… go away. Please.”

Even with the storm that’s been raging inside you for the past hour, your polite reflexes still manage to kick in, and Adachi can’t help but chuckle at that.
His slightly mocking laughter is what sends you over the edge, and before you can fully realize what you’re doing, you’ve crossed the distance between the two of you and you’ve tightly closed your hands on the lapels of his jacket.

“Are you seriously laughing at me?!” you hate the way your eyes start to prickle with tears again, liquid anger and sadness threatening to spill on your cheeks once more. “Do you think this is funny?!”

Adachi’s smile dies a bit on his lips, and he blinks in surprise, not having expected you to react so hotly.

“I’m sorry, I didn’t mean to mock you.” he raises his hands defensively, and even with the tears clouding your eyes, you notice how long and unnaturally sharp his nails are. “And this whole situation is far from being a game to me, really. I actually came here to offer my help.”

It’s your turn to be taken aback, and your grip on his clothing loosens a bit. The demon uses the opportunity to gently wrap his hands around your wrists and remove them from him altogether, and you let him do so. Even though he’s almost got claws for nails, and his long fingers could easily bruise you if he so desired, Adachi’s careful not to hurt you as he places your hands back to your sides.

“Offer your help?” you repeat, skeptical.
“Yup.” he nods as he crosses his arms in front of him, his smile growing just a bit. “I mean, Fukuda really screwed you over, didn’t he? So… I thought you might appreciate some… help to get back at him.”

At the mention of your former boss’ name, you take a step backwards; and although your hands don’t curl into fists again, your fingers tighten a bit and your limbs tense. It’s not just that Fukuda’s name activates an antagonistic response in you; it has more to do with the fact that Adachi is well informed regarding your latest mishap.

“How do you know that?” you answer, your expression turning more wary.

You don’t have any way to know that, but your reaction is exactly what Adachi expected and wanted. It’s not fun if humans trust him right off the bat: he finds it far more amusing when he has to earn that trust. On top of that, he’s rarely been as interested by a mortal as he’s intrigued by you, which he’s sure will make this whole affair even more worthwhile… especially since he’s promised himself, as an additional challenge, to be as truthful with you as he can.

“Easy: I’ve been watching you for a while.” his grin turns almost feral, and your heart misses a beat. “Us demons are very sensitive to certain human emotions; for some it’s lust, for others jealousy…”

Adachi lets his voice trail off, expecting you to ask him to continue. You know it’s what he wants, and though a part of you refuses to play whatever little game the demon has planned for you, your curiosity has you giving in:

“And what emotion drew you to me?”
“Easy!” Adachi laughs, and there’s that dangerous glint in his deceptively fond gaze again. “A very, very strong yearning for revenge.”
“… revenge?” you blink in surprise.

It’s not the answer you have been expecting at all. Hate, anger, sadness; those wouldn’t have surprised you in the least. But… revenge?
Your astonishment doesn’t escape Adachi, and his grin grows even wilder and larger as he watches you do your best to understand what he means. He’s tempted to let you think about it a little more, but he’s so excited for what’s to come that he can’t help himself but explain a bit:

“Yes, revenge. And really, who could blame you? Fukuda’s a real monster, and that’s coming from a demon. The way he treats his employees, especially those who won’t agree to get bent over his desk… no wonder you yearn to get even with that fucker.”
“I… I don’t want to “get even”.” you’re quick to clarify, and Adachi quirks a suspicious eyebrow. “I mean, yeah, I’m really mad at this sack of shit for firing me, but-”
“And for spreading all those rumors about you being a nasty manwhore trying his best to plow everyone in the workplace.” the demon supplies, tilting his chin with a pensive index.

The glare you shoot him is outright murderous, and it sends a most pleasurable shiver down his spine.

“Thank you for reminding me of that.” you growl. “So yeah, that too. But that doesn’t mean-”
“Honey, do you really think I just visit anyone who’s “really mad” at someone?” Adachi sighs, doing his best to make his imitation of your voice sound annoyingly innocent. “Because if I did, trust me, I wouldn’t be here, having a chat with you. I’d be signing ten contracts a minute.”
“Okay, then maybe I’m more than mad.” you concede, Adachi’s intense, knowing gaze making you feel uneasy. “Maybe I’m really fucking furious at him. But that doesn’t mean I wanna take some form of revenge!”
“Sure you don’t.” Adachi shrugs as he takes a step towards you. “That’s why you attracted a literal demon of vengeance’s attention. Because even though you’re angry, you’re a sweet little boy who’s gonna happily forgive his big bad boss for how he humiliated him and destroyed his career. Oops, sorry, big bad former boss.”
Get out.”

This time, you don’t bother to grab Adachi by the clothes, nor do you make any effort to sound or look threatening. You’re just so utterly done, both with Fukuda’s bullshit and Adachi’s, that you don’t want to spend any more energy than necessary on dealing with the demon. You simply cross your arms in front of you, defiantly.

“Ugh, fine.” Adachi rolls his eyes, as if he’s dealing with a petulant child and not a grown man. “I promise I’ll leave, but only after you’ve heard me out.”
“I think I’ve heard enough.” your gaze meets his.
“Trust me, you haven’t.”

Adachi’s shit-eating grin is back, but this time, there’s an excited twinkle in his eyes, like a promise that something huge is about to come.

“So, let’s get back to where we were, yeah? Revenge. You can deny it all you want, to me, to the whole world, and to yourself, but we both know that’s not the truth, honey.”
“Don’t call me that.” you hiss, hating the sadistic and smug twitch at the corner of Adachi’s lips.
“Aw, sorry. Is sweatheart better?”
“No.” you can feel yourself starting to lose your patience, especially with how punchable Adachi’s face looks right now.
“Baby? Darling? Cutie?” he tries again, not particularly bothered when you take a step towards him.
“Still no.”
“How about angel?”

Your eyes widen, your mouth opens, your fists start shaking with sheer rage, and Adachi knows he’s hit the jackpot.

“Oh? You like that one, angel?”
“Don’t you dare call me that again!”

This time, you swing your fist towards his face. The demon easily dodges your attack and grabs your wrists. You try to pry them out of his grip, but his cheerful demeanor hides a scary, quiet strength, and you can’t manage to free yourself.

“Tsk, tsk, how rude. I thought you liked that nickname!”
“I don’t.” you seethe through gritted teeth, memories you had done your best to repress clawing their way back to the surface.
“Really? But you always looked so happy when your dear Hayato-kun called you that!”

There it is, the name that you had fought so hard to banish from your mind, and Adachi speaks it like it’s nothing, with the same breezy, fake cheerfulness than before. His pupils dilate when he sees raw sadness wash over you, and he delights in knowing he’s successfully managed to land a blow to the protective walls of your psyche.

“How… how do you even…” you blink back tears. You’re not even struggling against Adachi anymore; all of your body’s efforts, physical and mental, are spent fighting against the onslaught of ugly memories rushing back to you.
“Like I said. You yearn for revenge, and you have been for years. When I said you had managed to get my attention, I wasn’t speaking about today.”

Your hands fall to your sides as Adachi lets them go, satisfied. The conflict between intense hatred, pure fear, shameful regret and outright sorrow looks so, so gorgeous on your face, and he knows it’s only a matter of time before you’re signing a contract with him.

“I mean, with all that anger and resentment that have been building up in here for a while, it’s not surprising at all you’ve ended up with a demon of vengeance in your living room, you know?” he pokes at your sternum with his index, strong enough to have you wince in pain.
“What does vengeance have to do with it?” you flinch away from his touch.
Everything!”

Adachi throws his head back and cackles, and for the first time since he has crawled his way out of your television, you fully realize how monstrous he truly is, underneath his human traits and amicable demeanor. You don’t know whether his laughter terrifies or excites you, and your mind still isn’t made up when he clasps your hands between his.

“Years and years of shutting up and taking it, from those idiot classmates, those dumbasses in college, those assholes at work… oh, you’ve been such a good boy! Such a lovely person, always ready to help those in need, always kind to the people around you… too bad no one’s ever done the same for you, huh?”
“Shut up!”

Gone is your dilemma between fear and excitement; what you’re feeling now towards Adachi is pure, blind rage. You try to break away from him, but he doesn’t let you, instead leaning in to whisper against your ear:

“Too bad the world doesn’t work that way, angel. Good people like you don’t get what they deserve. They get laughed at and abused, again and again, until they either break or become just as heartless as the others. There won’t ever be a happy ending for you, no matter how hard you try.”
“SHUT UP!”

This time, you scream, and Adachi lets you go. You tumble backwards and crash on the floor, tears of anger and sorrow streaming down your cheeks.

“Aww, poor little thing.” the demon kneels in front of you, his wings starting to wrap around the two of you in a comforting embrace. “The world is really unfair, isn’t it?”
“That… that’s bullshit.” you spit. “Everyone’s on this planet isn’t a… an asshole.”
“Sure. That’s why you’re alone, jobless, single and with no one to call for support when things go south.”

That last sentence pierces right through your heart, and Adachi knows it. He tentatively raises a comforting hand to your cheek, smiling when you don’t push him away.
You shouldn’t let him stroke your skin, you know it, but you let him regardless. The gesture is comforting, and you lean into his touch. You’re almost sure Adachi isn’t done spewing hateful drivel, but you need the comfort so bad, you stop caring for a moment.

“Honestly, how is any of that fair?” Adachi sighs after you slowly, but gently, push his hand away. “Look at you, look at the state you’re in. Such a cute, bright boy… what a waste.”
“Did you come here only to cry over my life story?” you hate the way your voice comes out, weak and sniffling.
“Of course not.”

Adachi helps you to your feet, and when your eyes meet, you see the serious look he’s now sporting. Gone is the childish grin, replaced by a deep, profound gaze.

“I came here to offer you a deal.” he announces, and you feel your throat starting to tighten. “To help you enact revenge on those that hurt you.”
“Fukuda?” you clarify, and your question has a tiny smirk starting to creep back on his lips.
“And others, if you so desire. The sky is the limit. Fukuda, of course, but… well, I’m sure paying Masako Mori a visit could be fun, don’t you think?”

The sudden, violent fire blazing in your eyes at the mention of that name is enough to make Adachi almost certain you’ll agree to sign a contract with him; oh, how he relishes the way your fists start to tremble with barely concealed rage, how your eyes suddenly shine with all the unspilt tears from your younger days.

“Masako Mori…” you repeat through gritted teeth, blinking back atrocious memories.
“Yup, and other people if you want to.” Adachi confirms, enjoying the way you look at him, as if you’re both mad at him and at that girl.

He doesn’t mind if you resent him for now; after all, he is actively bringing up awful echoes and names from your past. But that doesn’t matter in the long run: he’s sure you’ll grow to love him just as much as he already loves you.

You remain silent for a while. Even though you didn’t believe in demons up until one had literally appeared in front of you, you have seen enough movies and read enough stories to know how a deal with one generally went. The devil will get what he wants out of his victim, and the poor sap who’s been roped into signing a contract will lose their soul – if not worse.

Besides, this simply isn’t the kind of person you are. Yes, it’s tempting – very tempting, even – to get your revenge on all the people who have deeply hurt you, but in the end, it won’t make you any better than them. Sure, it would be cathartic in the heat of the moment, but then, you’d be left with more regrets than satisfaction.

“No thanks.” you finally shake your head. “Not interested.”
“Really?”
“Yeah. I’m not a killer.”
“Wow! Who said anything about killing them?” Adachi’s eyes go wide, although he’s absolutely thrilled you immediately associated vengeance with murder. “When I talk about revenge, you only take it as far as you want. Whether that means you want to prank call them or mutilate their groveling body is entirely up to you.”

The thought of brutally harming Fukuda has your heart missing a beat, and Adachi chuckles. He knows the shadow that passed so briefly over your face, he knows the blush that just washed across your cheeks.
But baby steps, he admonishes himself.

“It’d… be up to me.” you repeat, scrutinizing Adachi’s face for the slightest twitch of a muscle betraying his true intentions.
“Entirely up to you.” he nods. “I’d just assist you with the… details. Say you want to teach Fukuda a lesson but let him live. It’d be pretty handy to have someone around to erase his memory of who beat him up, right?”
“Hm…” you ponder silently, before asking a vital question. “And what would you want in exchange?”

There it is- the million-dollar question. In Adachi’s mind, there’s no doubt you’ve already taken your decision, even if you don’t know it yet. If you were completely against his offer, you wouldn’t even care to know what would be the price to pay for his help.
As such, the demon doesn’t even bother to hide his grin when he explains:

“Easy. I call it the principle of equivalent exchange. Let’s say…” he thinks for a bit: the more violence you unleash on your targets, the easier it is to apply his principle, but he doesn’t want to scare you too much. “Let’s say… you decide to beat Fukuda up. I’d let you do it, clean up afterwards and make sure he doesn’t remember you did it to him, then we come back here and you let me rough you up a little.”

You blink dumbly, as if you’re having trouble processing his words. And maybe you are, because you certainly weren’t expecting that kind of answer.

“That doesn’t only apply to beatings.” Adachi clarifies. He’s almost certain that once you’re given absolute freedom over what punishment to unleash over your victims, you’ll eagerly go for a violent option, but he plays along regardless. “If you want to steal all of his money or something like that, you’d have to give me something material that matters to you.”
“I see…” you whisper, deep in thought. “So, uh, you’re not going to take my soul?”

Adachi barks in laughter at your almost innocent question, fondly ruffling your hair when you shoot him a death glare.

“No, of course not! Why do mortals keep asking that? What do you think I would even want or need your soul for?”
“I don’t know, I’m not the demon here.” you snarl. “Maybe to keep me for all eternity or something like that?”
“I don’t need your soul for that, baby.” Adachi’s voice drops to a low, unexpected purr, and you almost jolt when his fingers move from your scalp to your chin, which they tilt upwards. “Trust me, when we get to really know each other, you’ll want to stay with me forever.”
“We’ll see about that.” you counter with a move of your neck, pushing Adachi’s hand away.

Sure, the demon is good-looking and has an inexplicable charm to him, but that’s not what’s on your mind right now. You try to stay focused on the offer at hand, to do your best to find any loophole in Adachi’s words so you don’t get trapped in a deal you might come to regret.

Adachi can practically see the gears turning in your mind as you obviously play his statements over and over in your brain, which he finds amusing. There’s absolutely no hidden meaning in his proposal – not that you’d trust him if he told you so. He doesn’t want to trick you: the fun in his deal resides in spectating what you’ll do with the help he’ll provide. Sure, you’ve made sure to say you’re not looking to kill anyone… but he can’t wait to see if – when – you’ll finally snap, once you have absolute power over the people you hate most.

“Would you kill me?”

The question takes him aback, and when he looks at you, really looks at you, there’s a nasty shine in your irises, one he absolutely cherishes.

“No.” he answers, and it’s the truth. Why would he kill someone who’s already looking so promising in terms of the entertainment they’ll provide? “Worst I’ll do is maim you pretty bad.”
“How bad are we talking?”
“Well… if you go really, really batshit and start using a chainsaw to cut a living being in tiny pieces, then I might have to take a limb or two. But don’t worry, I’d still let you keep at least an arm and a leg.” Adachi promises, his tone a parody of tenderness.

The back of your throat fills with bile at the thought of doing something so horrendous, but it’s always good to envision a worst-case scenario.
You take a deep breath, and you immediately notice the way Adachi’s tail starts swinging behind him. The two of you already know what you’re about to say, but that doesn’t make it any easier for the words to come out of your dry mouth:

I decide how many people I want to get even with, right?”
“Yes.” Adachi nods, excitement barely contained.
“And… I get to decide how I get my revenge?”
“Of course. Don’t wanna make you do anything you’re not comfortable with.”
“Then…”

For a fraction of a second, you hate yourself. You hate that you’re betraying all of your ideals, that you’re foregoing all the principles you’ve set for yourself, that you’ve let a literal demon worm its way into your head and whisper such sweet, awful truths about your reality.
But then, you extend your hand, and when you loudly announce your resolve, you feel an immense weight leaving you:

“Adachi, I want to sign that contract with you.”
“Amazing!” the demon cackles, taking your hand in his and shaking it vigorously. “Oh, I can’t wait for us to get started! Although we’ll have to properly sign the contract first, of course.”
“And… how, exactly?”

You reflexively start to look around for a pen, although you have a hunch it’s not going to involve literally signing a paper. The way Adachi threads his fingers with yours confirms your suspicions, and his lips are impossibly close to yours as he whispers:

“Easy, we just have to exchange bodily fluids. It’s usually done with blood or cum.”
“… okay.” You breathe out, ignoring the way the tip of your ears has flushed red at how nonchalant Adachi sounds while saying something so scandalous.
“Since you’ve been such a good boy, it’s up to you, baby. Which do you pick? Blood is quick and easy, but cum…”

His mouth presses against yours for a painfully short instant, and his voice is impossibly sultry when he exhales:

“… is a lot more fun.”

With how close Adachi’s body is to yours, it’s impossible for him not to feel the way your chest has started heaving against his. The demon has a good guess as to what you’ll choose, but he still wants to hear it from you.

“So what will it be, baby?” he asks, one hand playing with your hair.
“Cum.” you whisper against his lips, earning an approving hum.

Your slightly shaky arms wrap around his neck as you pull him in for another kiss, deeper than the previous one. Adachi can almost taste all of your pent-up frustration as he swipes his tongue against your lips and slides it between them, earning a pleased moan as you allow him access to your mouth. He slowly caresses the inside of your cheeks, angling your head to his liking with the hand that’s cradling the back of your skull.

Adachi’s other hand wraps around your waist, and you’re practically melting into the kiss, when you suddenly feel something slither between you and Adachi. Your eyes shoot open when it starts rubbing against your clothed sex, and the demon chuckles when you notice what exactly is caressing you so teasingly.

“You’ll see, baby, once you’ll get a proper taste of me, you’ll never be satisfied with another human lover ever again.” Adachi murmurs against your jaw as the tip of his tail keeps rubbing languid circles over your loins, until it stops and leaves you panting. “I’ll ruin you.”
“Ruin me, huh… as if I’m not already on the verge of running myself by signing a contract with a demon…”

The cynical look you cast him, even as you’re such a mess in his hands, lips parted and slick with spit, face flushed and chest heaving with each breath, makes Adachi so, so happy he’s set his sights on you.

“You’d be surprised at how many people would do so in a heartbeat.” the tip of his tail slides between your shirt and your pants, slithering down to the front of your boxers, rubbing the hardening heat it finds there at an agonizingly slow pace. “But I don’t think all of them would let a demon ravish you the way I’m about to.”
“You were the one who brought up swapping cum- aah!” you moan when his tail slides underneath your underwear and gently rubs the tip of your cock.
“Not everyone goes for that option.” his laughter is cruel, and then his lips close over your neck, sucking and leaving a bruise. “Like I said, blood is easier and faster.”

Your fingers tangle in his hair, pressing Adachi’s face closer to your collarbone, where the demon leaves a few bites with his pointy teeth.

“I have a feeling we’ll have a wonderful partnership.” he grins against your skin, relishing the noise of protest you let out when his tail stops rubbing over your arousal.
“K-keep going!” you urge him, a sigh escaping your parted lips when his tail’s lazy motions resume.
“As you wish… but I think we should go to your bedroom, we’ll be more comfortable.”

He removes his hand from your head and snaps his fingers; for an instant, you feel an extremely cold wind rushing over you, and then, the two of you are standing right next to your bed.

“You… you do realize we could have just walked there, right?” the only reason you’re not rolling your eyes is because Adachi bites down right above your collarbone, harshly but not enough to draw blood, short-circuiting your brain for an instant.
“Mmmh. But it’s quicker that way, and besides, we don’t have clothes getting in our way now.” he laughs after kissing the small wound.

You had been so lost to the blissful sensation of Adachi’s tail rubbing against your dick and so distracted by the demon’s mouth playing with your skin that you didn’t even notice the two of you were now stark naked before he pointed it out. A feeling of shame seizes you, and all of a sudden, you’re very aware of the lecherous gaze Adachi is letting roam all over your body. The demon notices your embarrassed gaze, and he makes sure to give you a proper show, looking at you adoringly as his mouth closes around a nipple and he sucks, humming in delight.

“Adachi-” you gasp, and his now bare cock throbs at the way his name spills past your lips.

Grinning against his target, Adachi wraps his arms around your waist and lifts you up, before unceremoniously dropping you on the bed and crawling on top of you.

“You look so gorgeous like that, baby.” he purrs, his hands rubbing at your abs with a possessive fondness. “Sprawled out underneath me, ready for me to take… fuck, I just can’t wait.”
“Then don’t!” you breathe out, his touch driving you mad with desire and with almost feral need. “Just… take me!”

From where you lie, Adachi fills your field of vision. His toned, muscled torso starting to glisten with sweat, his dangerously pointy horns, his spread out wings that seem to protectively trap you against him, his hands that rub and fondle and tease all over your body, the look of pure debauchery on his mischievous features – it’s divinely tempting, and you give in, throwing your head back against the pillow and gyrating your hips against the tail that coils around your shaft, its embrace strangely warm and so, so addicting.

“I will, baby, don’t worry about that.” he chuckles darkly and savours the protest you groan when his tail retreats and leaves your dick weeping with precum. “Aww, aren’t you needy. Don’t worry, I have something else to keep a good little fucktoy like you happy.”
“Hey, don’t call me- mmh!”

Before you can fully voice your disagreement, you feel something hot and hard being pressed and ground against your member; your eyes trail downward, and they unsurprisingly fall on Adachi’s cock, which is longer and thicker than any dick you’ve ever seen – perks of being a demon, you guess.

“Mmmh, fine, fine.” Adachi rolls his eyes, but he’s still smiling that infuriatingly smug smirk.

He presses the tip of his tail against your lips. You shoot him a dark glare, but you still part your lips open, allowing his appendage to slip inside and coat the inside of your cheeks with the few drops of precum he’s gathered.

“I guess I’ll just keep that cute nickname for later… when you’ll be even more desperate for me to touch you than you even are. The way you’re already writhing underneath me and so fucking hard?” the demon chuckles, and he stops moving his hips – as hard as it is, you refuse to whine in protest. “That’s just the beginning, baby. You’ll see just how fun it can be to be my partner.”

“Partner” could be romantic in a lot of contexts, but definitely not now, not when Adachi presses open-mouthed kisses on your jugular as his tail keeps your mouth full and your tongue busy. Your breath grows labored, mind starting to fog with lust, and Adachi senses that you’re starting to let your defenses down, trusting him just a little bit more.

With an almost gentle smile, he removes his tail from your mouth, quickly replacing it with his tongue before you can protest. That kiss is as painful and bruising as it is passionate and libidinous, and your hands find the root of his wings, your fingertips tracing angry lines down his skin as you both lose yourselves in the heat of your embrace. Adachi’s hands bury themselves in your hips, claws digging so deliciously and painfully in your flesh as he maneuvers your body up and down, getting both of you off against the other’s arousal.

When he rips his lips away from yours, decadent strands of saliva linking them as you both take back your breath, Adachi’s smile is predatory as he lets you choose:

“So what will it be, partner? Where do you want my cum? And where do you want to shoot your load? Mouth or ass, doesn’t matter, the contract will be forged in either case.”

You’re still trying to catch your breath when the demon offers you that obscene choice, and you mentally slap yourself for letting him reduce you to such a panting, horny mess so soon. You take a quick glance downwards – yeah, he’s definitely big. You’re not sure you’ll be able to accommodate him in either hole; still, you figure it might be easier to use your mouth. As for where you want to bury your cock… for a moment, you’re tempted to ask him to ride you, but then you figure that if Adachi’s blowing you, that keeps his mouth busy and shuts him up. Which sounds pretty nice right now, if you’re being honest.

“How about you blow me, and I return the favor?” you answer, still slightly breathless.
“Fine by me.” Adachi grins in reply, and his fingers start to massage your skin, his gestures almost gentle. “You’ll see just how talented I am with my tongue.”

He illustrates his point by letting the wet muscle drag on your cheek, before sliding it between your parted lips. Adachi runs his tongue over your teeth, humming in delight before removing his mouth from yours; there’s such a malicious glint in his golden irises that it makes your legs tremble in anticipation.

“So… how are we gonna make this work?” you wonder out loud, your hands idly caressing the skin around his shoulder blades. “Like, are you gonna be on top, or-”

Adachi’s laugh is mean and airy as he cuts you, and he kisses the top of your nose when you offer him an annoyed snarl.

“Haha, good one, baby! Have you seen my cock? I mean, yeah, I’ve seen how hungrily you were looking at it just before, but I can safely say that you’re not going to be able to take it easily in that pretty mouth of yours if we do it at that angle… no, I think we’ll take turns. That way, you won’t be distracted by how good I’m making you feel, and you’ll be able to fully appreciate my cock as you worship it.”
“… has anyone ever told you that you’re really fucking pretentious?” you sigh, hating how dry your throat feels at the thought of Adachi sucking you off… and of getting properly acquainted with his dick.
“Plenty of times. But I can assure you I’ve got the skills to back those claims… and I can give you some concrete evidence right now.”

Adachi’s hold on your hips grows firmer, his nails so close to scratching at your skin you almost wish he’d sink them in your flesh already. He licks his lips, his tongue’s movement slow and depraved, and then his mouth brushes against your sternum. Wanton moans vibrating again your chest, the demon kisses his way down your torso, lips almost reverently caressing your heated skin. Sometimes his tongue darts out, licking languorous circles; sometimes his teeth ever so softly graze over a beauty mark or a blemish, with just enough pressure to sting but not enough to break the skin, leaving small adoring pinpricks all over your belly.

“Fuck, Adachi…” you can’t help but be helplessly aroused by the languid attention the demon is giving you, each kiss, each bite, each lick sending shivers down your spine. He’s very, very good at making you so needy it almost hurts; you want him to hurry up and start to blow you already, but at the same time, you relish the almost tender way he has of kissing his way down to where you need him the most.

You can feel him smirk against your navel, and you groan at how infuriating it is; but then, Adachi’s mouth grows hungrier and hungrier as it trails down your pelvis, and your heart skips a beat when his lips leave your skin, only for his tongue to immediately latch onto your length, licking a lazy stripe up until it massages the head of your cock. Your hands reach for the demon’s hair, but before your fingers can even graze against his raven locks, Adachi’s tail wraps around your arms and holds them captive, forcing them to rest against your heaving chest.

“Nice try, baby.” Adachi lifts his face up just enough for you to see the mischievous look he gives you. “But you don’t get to boss me around.”
“T-then just suck me already- ah!”

Adachi’s tongue, who was absentmindedly following a vein, now circles your meatus, and your eyes close in pleasure as the demon savors the drops of precum gathered on the tip of his tongue.

“Mmmmh… you taste so fucking good.” he hums approvingly, one of his hands leaving your hips to fondle your balls. “So horny and desperate for me… I could play with you for hours. I could drive you crazy, just with my tongue and my fingers, tease you until you’re nothing but a mindless mess begging me to let you come… doesn’t that sound nice?”
“A-absolutely not.” you hiss, hating the whimper that leaves you when Adachi’s other hand starts stroking your dick in slow movements, starting at its root and going all the way up to its weeping head.
“Awww, I’m sure you’d love it. But don’t worry, it’s not what I had in mind for today anyways.” Adachi chuckles, his breath coming in heavy puffs over your arousal. “Since I literally need your cum, I’ll show you how good I am at milking pretty boys like you dry.”

You don’t get any other warning before his hand leaves your member and Adachi replaces its languid strokes by the wet heat of his mouth, taking you all at once, your dick hitting the back of his throat as he moans around it. The noises barely escape his mouth, since your cock muffles them; but they reach you all the same, and you arch your back when Adachi’s head starts moving upwards. The demon only keeps the tip of your cock on his tongue, cradling its sensitive underside with his wet muscle; you barely get to enjoy that massage before Adachi deep-throats you once more, with even more fervor.

“A-adachi, fuck, faster, please-” you start whimpering, desperate for the demon to pick up his pace.

You can feel his laughter echo against your member, and you’re worried Adachi is simply going to ignore you. But he complies, his head bobbing faster as he keeps working your cock, his impossibly long tongue gliding beneath your shaft with each movement, one of his hands fondly massaging your sack and the other rubbing soothing circles over your hip.

You throw your head back, and you feel a familiar knot starting to tighten in your lower belly; your breathing grows more and more erratic as your pleas for the demon to keep going start to become more incoherent. Your jumbled speech only spurs Adachi on, you can feel it directly as his own pace loses its almost steady rhythm. His back and forth motions become unpredictable, his lips dragging at an impossibly slow pace until they’re barely kissing the tip of your cock, only for Adachi’s ravenous mouth to immediately and greedily engulf your member in one go.

You’re on the verge of reaching your climax: your bound arms writhe underneath the firm hold of Adachi’s tail, your eyes roll back into your skull as you moan in ecstasy, your hips snap in an attempt to keep yourself in the wet heat of Adachi’s mouth, your back arches as you feel your orgasm nearing, any second now-

But then, the bastard stops blowing you, his lips leaving your pulsing length with an obscene pop.

“Are you close, baby?” the demon has the audacity to ask, a languid smile stretching across his spit-slick lips.
“I… I was!” you heave, and you hate how utterly desperate you sound. “Why did you stop?!”
“Because I wanna hear you beg for it.”
“What?! H-hey, you need my cum, don’t you? To seal the contract! So why- mmh!”

Adachi cuts your protest short, idly rubbing his index up and down your dick, his golden eyes still peering into you.

“Hmm… remind me who asked to sign that contract again?” you guiltily avert your eyes, earning a mocking laugh in response. “Yeah, that’s what I thought. So come on, beg for it, and I promise I’ll let you come.”

For a moment, you hesitate. There’s something weirdly humiliating and strangely pleasant about Adachi’s request; it sends you back a few hours earlier, in a certain office-
You put that memory as far away as you can, reignited anger giving you the push you needed to give in to the demon:

“Please, Adachi, let me cum!” you deliberately give your voice needy inflections - not that you need to force yourself much to achieve that effect - figuring the demon gets off feeling like he has power over you; plus, it makes the pleading easier to get out. “I need it so badly, so please, let me cum!!”
“Good boy.” the demon approves, his voice low and sultry.

He takes you back between his lips, and his talented mouth starts working its magic again. Even as you can’t help but let your eyes flutter shut in ecstasy, Adachi watches you intently as you finally reach the apex of your pleasure, a litany of the demon’s name spilling from your lips along with a flourish of expletives and ragged moans. Adachi’s bright yellow irises take it all in, savoring how beautiful you look as you pump your seed down his throat, drowning in bliss – all because of his doing.

“Fuck… that felt so good, holy shit…” you pant, slowly coming down from the delectable heights of your climax.

You don’t know if it’s because you’ve been so tense all day long, because of Adachi’s admittedly amazing blowjob skills, or because of something else – you definitely hope it’s not because of the perspective of signing a literal deal with the devil or because you’ll soon be able to enact sweet, sweet acts of revenge, some of which are long due – but you’re not sure you’ve felt this good or came this hard before.

Adachi keeps you in his mouth until your cock starts to soften, greedily swallowing any remnants of your seed. He only lets it go when you start to whimper, the damp warmth of his mouth feeling too much around your overly sensitive dick.

“I’ve done my part.” the demon hums, satisfied, as he crawls on top of you. “And I’d say I’ve done a damn good job at it, didn’t I?”
“… sure.” you sigh, not wanting to stroke Adachi’s already massive ego.
“Awww, why can’t you be honest?” he pouts, his hands snaking to your flushed cheeks, cradling them in a gentle embrace. “Those pretty noises you made when I was blowing you made you sound like you were having a great time… but that’s fine. Your behavior then tells me everything I need to know about fucking good I made you feel.”

He presses his lips against yours, coaxing you into a sloppy kiss in which you can taste the bitterness of your essence. You’d find it disgusting, but Adachi has a way of kissing that revulsion away, and his half-lidded eyes still shine with malicious lust when he pulls away.

“I believe it’s your turn now, partner.” his crooked smile widens, and you take a deep breath.
“Y-yeah, of course.” you try to play it cool, like you’re not about to give a blowjob to a fucking demon as a way to seal a contract with him.

Adachi shifts, allowing you to rise from the bed, your legs a bit unsteady as the demon guides you to the floor. He sits on the edge of the bed, and you end up between his legs, inches away from his dick. You shoot him a dark glare when you notice how demeaning – and certainly, definitively not pleasantly arousing – it is for you to sit at his feet as you’re about to blow him.

“Can’t we do it on the bed, like you did for me?” you try, earning a mocking grin.
“No, sorry. I find that angle much better when I want to see how much someone is enjoying servicing my cock.”
“Ugh… I know I’m repeating myself, but you’re really, really conceited.” you groan, remembering how good it was to shut Adachi up by burying your dick in his throat.  

You try to forget about the almost pleasurable anticipation coursing through you as you take a proper look at the erection so close to your lips. Yeah, it’s definitely bigger than any dick you’ve ever sucked, and you’re almost certain you’re not going to be able to deep-throat him.
For a moment, silence falls between you, as you’re still a bit anxious – not only because of Adachi’s size, but also because you’re moments away from definitely sealing your contract.

“What’s taking you so long? Get to it.” Adachi snarls, his playful and amicable persona slipping and giving you a glimpse at the dark depths lurking within.

It shouldn’t surprise you – he is a demon, after all. But as much as you try to brush that thought away as you slowly drag your tongue over his shaft, that sudden harshness fuels your arousal, pushing you to languidly lick Adachi’s dick as your hands wrap around the base of his member, gently stroking.

“Mmmh… much better.” the demon sighs as he threads his fingers in your hair.

You pause for a second, dreading that he’s going to force you down his length. But Adachi seems content to let his fingers massage your scalp, so you focus back on his dick. Having almost lovingly caressed it all over with your tongue, you decide to use your lips now, starting by kissing the tip of Adachi’s cock. The precum that begins to glisten there mixes with your saliva, and the salty taste fills your mouth as you start to move your lips down the demon’s heated length.

“That’s it, baby, that’s the spirit.” Adachi’s encouraging tone is slightly mocking and mostly pleased, and he watches with delight as you do your best to fit more of him in your mouth.

He finds it such a beautiful sight, even more so than the vision you offered him earlier, when you were at the mercy of his mouth and his fingers, begging him to let you come as your body tensed and sang your desire for him. Having you on your knees, your eyes shifting between his cock and his face, such lovely noises leaving you as your already stretched cheeks hollow and you suck him, your fingers stroking what you can’t fit in your mouth… fuck, it has him bucking his hips, laughing cruelly when you start gagging around him.

“Oops, sorry.” he apologizes, not feeling sorry in the slightest.

You try to convey your annoyance through a glare, but it only makes Adachi hum in delight.

You’re certainly not enjoying yourself as much as you did back when your roles were switched, but as much as you loathe to admit it, there’s something guiltily enjoyable about having a demon’s cock lovingly rubbing the inside of your mouth and starting to caress your throat as well. The groans you let echo around his dick start to mix with moans, and that should horrify you – and Adachi sees it, sees those subtle shifts in your expression as you keep trying to tell yourself you’re simply doing this as a means to an end, and not because it’s so much fun. Fuck, he loves humans like you, and he’s so, so happy he’s set his sights on you.

“Hah… I’m getting close, baby.” he breathes, and you can feel his fingers starting to pull a bit on your hair. “You’re doing such a great job… it’s okay if you can’t take all of my cock yet, we’ll work on that.”

The noise that leaves you when Adachi brings up the perspective of those intimate encounters happening again is non-descript, and you’re happy to leave it at that – there’s already too much going on in your mind. How heavy Adachi’s cock feels on your tongue, the faintly salty and shamefully addicting taste of his skin, his hands that caress your head with just a tinge of harshness… Adachi can see how hot and bothered you are, your arousal only deepening with his dirty talk, so he keeps it up.

“We’re gonna have so much fun together, baby!” the demon laughs, and he can’t help but move his hips a bit, watching as you struggle to keep breathing properly. “Haha… I can already see it, you’re gonna be such a good fucktoy, such a good partner, we’ll do so many things together!”

You can feel the way Adachi’s dick twitches in your mouth, and that combined with the increasing strength his fingers apply on your head tell you he’s about to reach his climax. His breathing grows more labored, but he keeps speaking in such a beautiful and sultry voice:

“Fuck, baby, I’m going to come! I’m going to fill your greedy little throat with my cum, and you’ll swallow it all like a good boy, and we’ll seal our contract, fuck, fuck- I can’t wait to see what we'll accomplish together, can you, baby?”

And with a shameless, obscene moan, Adachi lets his orgasm wash over him, his cum flooding your mouth in thick ropes you allow to slide down your throat. His essence fills your tastebuds with a bittersweet aroma and something unidentifiable, something that is Adachi’s and that you know you won’t be able to clear your tongue or your mind of for a while – and the terrifying thing is, you don’t know if you care.

“Open wide, baby.”

As the demon’s fingers replace yours on the base of his dick, Adachi’s voice isn’t much more than a whisper, but you hear it as loudly as if he’d shouted at you. You comply, and he removes his dick from your welcoming heat with a satisfied hum, his grin adoring and cruel when he wipes his cock on your tongue.

As the last of Adachi’s cum ends on your tongue, you feel a sudden searing, satisfying pain in your lower back that has you screaming in pleasure and in agony as soon as the demon entirely removes himself from your mouth. You quickly turn and do your best to look at your back, and your eyes widen when they get a glimpse of a strange crest that appeared out of nowhere on your sacrum, right above your ass: it’s an intricate, elegant amalgamation of purple curves and swirls that spread over your lower back, like a tattoo.

“What… what the fuck is this?” you pant, and your eyes snap upwards, where they meet amused, vicious golden irises. “Is this… is this some kind of branding?!” you’re infuriated, even though a small, tiny part of you can’t help but relish the thought of being marked as Adachi’s.
“Of course not!” Adachi laughs, shaking his head, as if he’s just heard the most ridiculous thing in his life. “It’s a seal to represent the contract we’ve signed. The day you want to cancel our deal, it’ll go away. Besides…”

He catches you off-guard, pulling you up until you’re both standing, and you almost collapse in his arms. Adachi gives you a wicked smile, and then his teeth close around your neck and dig deep enough to draw blood. You grunt in pain and in shameful pleasure as the demon licks the mess he’s made up, before he resumes with a sweet tone:

“… if I really wanted to brand you, I’d make it more painful and more obvious. I’d make sure everyone knows you’re my bitch.”
“What are you even- I’m not your bitch!” you scoff, offended. Adachi kisses your forehead as if to apologize, but you know he’s not feeling sorry in the slightest.
“Yeah, yeah, I’m just teasing. I told you, we’re partners now. And you’ll see just how kind I am to my partners. For instance…”

He lets a finger slide up from the ass cheek it was teasing to the glyph on your back; his fingertip pulses with a soft orange glow for a second, and when it presses down on your skin, you feel an intense jolt of pleasure course through your body.

“… I’ll take very good care of you, baby. I’m really looking forwards to what we’ll accomplish together… don’t you?”

His eyes look straight into yours, love and lust and glee and destruction shining in them, and as you feel your lips curl into a lecherous, lethal grin, you enthusiastically nod your head.

Notes:

Important warning: next chapter will feature Reader's first murder, so expect very graphic violence. If you just want to read the sex scene that'll follow it, I'll include a sentence so you can search it on the page and skip the violence (which will be referenced, but ofc not be as explicit). I wanna experiment with incorporating horror into an erotic/sex story, but I guess not everyone is up for that and some might just be here for Adachi sexy times which I more than understand :p

I have a question for you, dear readers: in my other stories, I often have Adachi refer to the female reader as a couple of misogynistic terms (mainly slut, bitch and whore) during sex scenes. I have 0 idea what the equivalent, if I use it, could be for a male reader... I'm open to suggestions. If you have other degrading terms in mind, even if they have nothing to do with those I mentioned, I'm all ears as well!
I'm on twitter (RottenCaramel), I don't post much but sometimes I post previews and I try to keep you updated on my fic schedule!

I don't know when the next update will be for this story... sorry OTL
In the meantime, if you enjoyed this first chapter, feel free to take a look at my other reader-inserts' summaries and tell me if one of them appeals to you so I can see if I can make it work with a male reader.

See you soon!