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The Devil is an Omega

Summary:

‘Go ahead. Take a chance. Hire the nerdy, dorky alpha.’

Bakugou Katsuki, 40 years old, is the editor of the most important Fashion Magazine in the country according to most — and the most important of the world, according to himself. Katsuki will do whatever he has to keep his magazine sales flying high.

It’s this ‘whatever it takes’ mentality that leads him to hire a brilliant young alpha journalist. Freshly graduated from Harvard with the highest honors, just returning to Japan, Midoriya Izuku’s resume was the stuff dreams are made of — the only but is that the 23 years old alpha doesn’t know shit about fashion.

Oh, and Izuku has a crush on his boss.

Notes:

This story is already published as a thread on my twitter. This version is (slightly) better edited, but it is the same story already posted there.

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

Chapter 1

Notes:

(See the end of the chapter for notes.)

Chapter Text

‘Go ahead. Take a chance. Hire the nerdy, dorky alpha.’

Bakugou Katsuki is the editor of the most important Fashion Magazine in the country according to most — and the most important of the world, according to himself. He’s a ruthless businessman with a keen intellect and sharp eye for trends and new designers. This all wouldn’t be anything unusual if it wasn’t the fact that Katsuki is an omega, and an unmated one at that.

He wanted to be taken seriously as a professional, wanted to climb the corporate ladder with his own strength. Most of all, Katsuki wanted to shut up everyone who said he couldn’t do it because he was an omega. So he couldn’t waste time with mates, courting, and whatnot.

Still, it’s all worth it. Bakugou is the best in his job, and he doesn’t care about how many sacrifices he needs to make in his personal life to keep this spot. Hell, he answers emails during his goddamn heat with a knotted dildo stuck on his ass. Katsuki will do whatever he has to keep his magazine sales flying high. 

It’s this ‘whatever it takes’ mentality that leads him to hire a brilliant young alpha journalist. Freshly graduated from Harvard with the highest honors, just returning to Japan, Midoriya Izuku’s resume was the stuff dreams are made of — the only but is that the twenty-three-year-old alpha doesn’t know shit about fashion.

Midoriya graduated with a focus on investigative journalism. He has lots of published articles and recommendation letters that can attest to his abilities of undercovering anything. So Bakugou figures that someone who is such a nerd will be able to learn the trade fast enough, and he could use a brain like Midoriya to balance out all the airheaded models running around his building.

What Bakugou wasn’t expecting, though, was that for the young alpha to be so fucking cute. How could he? What kind of alpha is cute ? Only Midoriya Izuku, apparently. Midoriya blushes and stutters just from looking at Katsuki. Hell, Midoriya makes grandpa sweater-vests look adorable just by the way he shyly twists the hem in his hands, looking at the floor while Bakugou tries to talk to him. 

And if being cute wasn’t enough of a problem, even though Deku acts like a blushing bride, he’s jacked like a proper alpha — big hands, thick thighs, broad chest. Katsuki can barely believe the boy is almost half his age, and he certainly can’t believe the way Deku’s scent goes from fresh and inviting to a thunderstorm of pheromones when he looks at Katsuki in tight pants. 

So that’s what Katsuki gets from hiring the nerd with the great curriculum — a young alpha who has the hots for his boss, a spinster omega who is almost twice his age. Well, at least the days at the office aren’t boring anymore.

***

This situation drags on because, if there’s something Bakugou won’t fucking do is let a goddamn brat who can’t even bring his coffee without spilling it all over himself knot him. Even if it meant Deku would get Katsuki out of his system and start behaving like a functioning adult, Katsuki has standards.

Deku is a goddamn mess — he freaks out so bad every time he sees Katsuki that Bakugou is so fucking tired of calling the damn janitor to clean the messes Deku makes. That’s precisely why the kid got himself the nickname Deku .

But, at the same time, Deku is really fucking smart and hardworking. He read every single edition of the magazine from the last twenty years in his first month working there. And then he got the sister magazines from other countries. And then he found the online bloggers. Six months in, Deku had more knowledge of past fashion trends than any of the designers Katsuki worked with. This kind of dedication messes up with Katsuki.

The worst of all, however, is the way Deku looks at him — like Katsuki had hung the moon on the sky himself. So many times had Deku gone on long speeches about Bakugou’s importance in the whole industry and how Bakugou was a driving force in stopping child and slave labor being used in sweatshops. The young man honestly believes Katsuki is a hero of some sort, protecting the poor and weak of the world. As if Bakugou hadn’t just decided he didn’t want to put low-quality stuff on the magazine. The way Katsuki sees it, he just decided to reward the brands who invested in the quality of their work and their workers.

It is addicting to be treated with such respect, such reverence; to see those sparkling green eyes who look only at him, even with young omega models parading around the office with the swimwear samples. No one can blame Katsuki for revelling in that attention.

And yet, Katsuki resisted. He focused on his job and made sure to keep Deku out of his office, writing pieces for the magazine.

However, one day, things went wrong.

Usually, Katsuki makes sure to leave the office in an appropriate hour to give his workers a good example. He isn’t fond of all-nighters or shit like that. People have to be efficient enough to finish their work in their working hours. But that day, everything went wrong.

It was the day to close the issue and send it to the printers, but one of the photoshoots got fucked up, and the photographer they hired to redo it got sick. They had to find a substitute in the last fucking minute, getting on Katsuki’s nerves. The pictures got there at 9 pm, and then they had to be edited appropriately for the magazine, meaning it was after midnight when Bakugou finished giving the ok for the issue to go into printing.

He was the last one in the office — or so he thought.

When he leaves his office, Katsuki sees a light at the end of the dark hallway. It’s the journalists’ office. Bakugou doesn’t have to think twice to figure out who is the fucker working at the wee hours in the night. He has only one workaholic journalist who is too stupid to follow Katsuki’s rules of no overtime.

Katsuki marches on, ready to give Midoriya a piece of his mind and maybe blow off some of the pent up frustration he had about everything going wrong that day. The journalists’ office is a big room where every journalist has a desk of their own to work on, and he finds the young alpha working hard, with several pictures of all kinds of things printed on top of his. 

“What are you doing here, Deku?”

Midoriya jumps startled, clearly he hadn’t noticed Katsuki entering the room.

“Mi-Mister Ba-Bakugou! I’m- I’m just-...”

“What is this?” Katsuki asks, curiosity now winning over his annoyance. It looks like pictures from photographers from several different specialties.

“I- I was just researching-”

“Wildlife photographers? What for?” he asks, confused.

“You- you refused all the photographers offered to you today because you sa-said they are all the same, and your readers deserve something new and exciting... So I- I thought about researching photographers from other fields that ma-maybe could do a photoshoot different from what the magazine always does...”

Deku explains with a bright blush on his face that Bakugou can see even with the dim lights of the office.

“That’s-” not Deku’s job. His editorial team should have thought that. Hell, Katsuki should have thought that. But here Deku is, spending his night awake to offer Katsuki something he needs and didn’t even know. “That’s a great idea. But something that can wait until tomorrow. This issue is already printing. We can talk about this possibility for the next one.”

“I- I know... But Mister Bakugou was still working... It didn’t seem right for you to be the only one trying to fix the problem tonight...” Deku says, looking down to the ground like a child that got caught misbehaving.

“Well, I’m going home now. You should come too.” Deku looks up to him startled, with huge, surprised eyes, and that’s when Katsuki realizes the hidden meaning of his words. “You should go to your home too. It’s way past your hour,” he fixes quickly.

“Of course!” Deku nods and starts hastily packing his stuff.

For some reason that even Katsuki doesn’t understand, he sticks around waiting for Deku to quickly put away his research and gather his messenger bag — a horrendous nylon thing that should have never been produced. Katsuki also doesn’t understand how Deku’s eyes became so keen for trends and designers in the eight months he’s been working there, and, yet, the alpha still wears the most outdated and fugly clothes possible. 

Today he’s wearing one of his infamous sweater-vests that bring fits of giggles to the models every time they see it. And, as if that was not enough, he paired it with khaki shorts. Any other employee would have been sent home with harsh words if they showed up in this get-up, but Deku is too much of a good worker for Katsuki to do that. And maybe that’s the reason there’s gossip going around the office that the boss has a soft spot for Deku.

They walk to the elevator in silence, though Deku’s anxiety speaks volumes. The nerd is trembling all over. Katsuki feels flattered — it’s been so many years (maybe a decade?) since he had that effect on alphas. When he was a young omega, unmated alphas would trip over themselves for a chance of riding the elevator with Bakugou; now, his employees do their best to not be forced into the confined box with their boss, afraid of Katsuki’s infamous temper.

As they wait for the elevator, Deku’s trembles become full body shakes. That strikes Bakugou as odd, so he looks carefully and sees that Deku’s face isn’t just blushing. He’s really flushed red and looking feverish. That can’t be just jitters about going on the elevator with Katsuki.

“Nerd, are you alright?” he asks, worried. “Are you coming down with something?”

“It’s no-nothing, Mister Bakugou. Just- just tired,” Deku answers shakily.

At that moment, the elevator arrives, and Bakugou enters, but the alpha stays behind.

“Aren’t you coming?”

“I- maybe- I think I’ll catch the next one.”

“Stop being an idiot. You look like you’re about to pass out. Get in here!” Katsuki demands and Deku obeys, scarred. 

However, the moment the elevator door closes them in the small space and the office’s scent neutralizers stop working, Bakugou is roughly punched by Deku’s scent. The alpha smells like thunderstorms and forests, fresh and destructive. And Katsuki had never felt Deku’s scent so strongly. Now, the shaking and the fever make sense.

“Deku, you idiot! You’re in a rut!”

“I- I’m sorry!” he pants. “I thought I had a couple of days, but maybe it came earlier and- I’m so sorry, Mister Bakugou. I’ll run home and lock myself there as fast as I can.”

But Katsuki barely hears Deku’s explanations. It’s been so damn long since he smelled a rutting alpha. His inner omega purrs and stretches lazily as if waking up from slumber to find out what’s going on. Katsuki can’t resist breathing in Deku’s intoxicating scent with greed, and that instantly makes his ass slick and his dick rise up.

“For a brat, you don’t smell half bad,” Katsuki whispers, taking a step closer to him. “You smell like a proper alpha.”

“Mi-Mister Ba-Bakugou,” Deku stutters, looking at him almost dazed. His lips part as he sucks in Katsuki’s scent like he’s about to die without air.

“Tell me, Deku, are you a big boy? Do you already have a proper knot to please an omega?”

Katsuki’s body is a hair away from Deku’s, and he can feel the heat emanating for the alpha, Deku’s warm breath fanning on his face. He doesn’t receive a verbal answer, though. Deku only croons at him; the inner alpha has taken control of his mind and tries to entice Katsuki to join him in his rut.

At that moment, every rational thought of why Katsuki shouldn’t take this almost rutting alpha home for a two-day fuckfest fly out of his mind, and he closes in, capturing Deku’s lips in a kiss.

Their kiss is messy and wanton. Deku doesn’t have much technique, but he certainly makes up for that with enthusiasm. His hands grip tightly on Katsuki’s waist, pulling him close and grinding their erections together. And Katsuki can feel over his groin that, yes, Deku is a proper alpha with a thick, hard cock ready to satisfy an omega.

When the elevator finally reaches the first floor, Bakugou doesn’t think twice before grabbing Deku by his awful tie and leading him like a puppy to his car. The only thought in Katsuki’s mind at that moment is ‘take the alpha to his nest’. 

During the ride to his place, Deku tries nuzzling at Bakugou from the passenger seat. All it takes is one pointed “Behave yourself, or I’ll make you behave” for Deku to sit back down like a good boy.

Katsuki was honestly amazed at how obedient Deku is. He’d never expect a rutting alpha to obey his orders and keep his distance. But Katsuki won’t complain about that since he needs to drive them safely to his home.

Pesky, annoying thoughts about how inappropriate it is for Bakugou to enjoy the rut of one of his employees, almost half his age, run in his head. But they can’t stand a chance against the power of Deku’s scent calling for him. Deku’s pheromones are thick inside the car. The young alpha is making sure Katsuki knows how much he wants Bakugou with soft, inviting croons and a sinful smell. 

And Katsuki’s inner omega is answering in kind. He can feel the sticky mess he’s making inside his pants. Consequences be damned. Katsuki will take Deku’s knot for all it’s worth and decide how to deal with the aftermath later. He’s not in his heat, so pregnancy isn’t a possibility, and whatever other consequences this has can be dealt with when they’re not so horny.

After leaving his car in his spot at his building's parking lot, Katsuki drags Deku to the elevator that takes them to his penthouse. In the elevator, they are all over each other, kissing and grabbing anything they have access to. 

Bakugou had already unbuttoned Deku’s shirt even with the vest in place when he opened up the door to his home. They are needy and feeling too hot, so whatever pretenses of being a good host and showing Deku around will have to wait. Without missing a beat, Bakugou pushes Deku to his bedroom, wanting nothing more than to see the young alpha in his nest.

Katsuki’s nest is a beautiful thing. A huge round bed that could easily fit four people, covered with the finest silks and cottons known to men. All in tasty neutral tones that look taken straight out a design magazine (and they were). But Deku doesn’t have the time to appreciate Katsuki’s decoration skills, for he’s roughly shoved to the nest, falling in the middle of it with his limbs spread.

The hunger and desire that Katsuki can see in Deku’s eyes make his blood run hotter than he thought possible. As he takes his white, ruffled shirt off, Bakugou can see Deku’s gaze following every new patch of skin he uncovers.

“Like what you see, nerd?” he teases, and Deku just nods enthusiastically.

“Mister Bakugou is perfect,” the alpha answers reverently.

Katsuki chuckles and starts working on his pants. Deku whimpers as Katsuki drops his underwear, and the room fills with the scent of slick.

“Ple-please, Mister Bakugou,” Deku pleads cutely. Who would think a rutting alpha could be cute? But Deku is absolutely adorable, all needy and shy. Katsuki wants to devour him. 

He takes a few steps towards the bed until his knee reaches the edge. “You want me?” he whispers.

“S-so much… Been wanting you for so, so long...” Deku answers unashamed.

“Fine, come get me.”

The moment the words leave his mouth, Deku is already moving. He pulls Katsuki to the bed and hovers over him. It’s unexpected to be manhandled like that by the soft-spoken and shy nerd, but Deku truly is an alpha; big and strong in all places that matter. His body is almost twice the width of Katsuki’s, even if they are close in height. The frumpy clothes he wears don’t make Deku justice at all.

Bakugou doesn’t have a lot of time to appreciate Deku’s body, because the alpha quickly decides he’s the one who will devour Katsuki. Deku latches on one of his nipples, sucking as if he was trying to drink milk out of it. With his other hand, he fondles the swell of Katsuki’s chest — hard-earned pec muscles that are now treated like boobs by the enthusiastic young alpha.

Still, Katsuki can’t find it in him to care when it feels so damn good. None of his knotted toys can play with his chest like that, so that’s something he usually goes without. Even when Bakugou finds a one night stand for a quick companionship or goes to Stallion Farms for his heat, the alphas aren’t so eager to play with a male omega’s chest. Alphas like the female omegas’ large boobs, not the hard muscles in Katsuki’s body. Deku seems to be an exception to the rule, though. The young alpha licks, sucks and nibbles on his chest and makes his way down through his abs. All the while, he mumbles soft little praises.

 “So perfect... soft and… hard...and warm... Mister Bakugou smells so good...”

Katsuki just lays back and lets the nerd do his thing since he seems to be enjoying himself so much. It’s a little weird because every rutting alpha Bakugou fucked always did their best to put him in a presenting position as soon as possible and just rammed away their cocks until their knots inflated.

Not Deku, though. Deku is taking his time with every bit of Katsuki’s body as he trails down to the omega’s sex. When Deku finally reaches Katsuki’s cock, he doesn’t think twice before starting to suck it too. 

Deku looks absolutely debauched, sucking the bead of Katsuki’s dick as if it is the most delicious thing he’s ever had on his mouth. He licks and lets the cock rub on his lips and face wantonly.

“Oh shit... Deku...” Katsuki moans as Deku starts sucking on his balls, his tongue playing with the soft flesh.

“So delicious...” Deku moans, “Smells so good,” and he nuzzles on Bakugou’s balls, rubbing his face and purring. 

It’s almost cute how Deku acts as if he was the one being pleasured by giving Bakugou a blowjob. Katsuki could have chuckled, but Deku’s wicked tongue finally meets its destination — his slicked hole.

It’s hard to say which one of them moaned louder. Deku dives in, pressing his whole face as deeply as he can to drink from Katsuki, absolutely parched. When he thinks he doesn’t have enough access, he props Bakugou’s feet on his back to spread the omega as exposed as he can, his strong hands digging in Katsuki’s thighs hard enough to leave marks.

It doesn’t take long for Bakugou to feel his orgasm building up. Deku’s tongue touches him sinfully, and the young alpha even dared to stick two fingers in Katsuki’s sloppy hole to urge more slick out of it. All the while, Deku doesn’t stop mumbling against his skin about how delicious and perfect Katsuki is. In the back of his mind, behind the fog of lust and pleasure, Katsuki wonders why Deku doesn’t mount him. Why he’s so focused on pleasuring Bakugou and ignoring his own needs.

But then, Deku curls his fingers, touching his prostate straight on, and every rational thought leaves Katsuki’s mind.

“Fuck-! Deku! I’m gonna cum!”

The warning only serves to spur the alpha on. Deku sticks three fingers inside his hole, and with the other hand, he starts jerking Katsuki off.

Bakugou cums, crying loudly, spilling his seed on Deku’s hand and squirting slick straight into the alpha’s willing mouth. As he shakes from the after-effects of a great orgasm, Bakugou tries to breathe and relax to get ready to repay Deku’s attention — but the alpha isn’t done with him.

Deku takes a moment to lick his own hand clean of Bakugou’s cum and then goes back to lap on the omega’s sloppy hole. Katsuki is feeling overly sensitive after his orgasm and ends up trembling all over from Deku’s ministrations.

“Shit- what the hell? Fucking nerd, what are you still doing there? 

“More, Mister Bakugou, please, I need more,” Deku pleads with a crying voice. He raises his head to show his pouty (glistening with slick) and begging eyes. It’s cute, adorable. Bakugou wants to cuddle the damn alpha and then ride his cock into the sunset.

“Sure, I’ll give you more, Deku,” Katsuki says, breathless.

Deku smiles at him and dives right back in between Bakugou’s thighs to continue eating him out.

Thankyou , thankyou, thankyou, ” Deku whispers, already lapping at Katsuki’s hole.

“What?! No! I’ll give you more meaning you can fuck me and knot me, idiot!” Katsuki barks, pushing Deku’s head away.

He expected to see Deku smiling brightly, happy to be allowed to fuck his boss. However, what he finds is Deku’s expression of surprise, incredulity, and slight fear. The same expression Deku made the first time Bakugou sent him to interview a lingerie model.

Katsuki has no doubt of what that means.

“Shit, Deku, are you a virgin?” 

“I- I-...” Deku stutters anxiously

“Damn...” Bakugou whispers. “A virgin alpha... Never thought I’d see one of your kind...”

“I’m- I’m-”

“Are you sure you want to continue? We can wrap this up, and you can keep saving yourself for someone special or whatever,” he grumbles.

“Mister Bakugou is special!” Deku interjects, making Katsuki chuckle. “You are!... Please don’t send me away...” This damn pout will be the death of Bakugou. “I promise to do everything Mister Bakugou tells me to.”

Well, with that promise, how could Katsuki ever say no? 

“Clothes off. Now.”

Deku scrambles up to his feet and kicks off his clothes as quickly as possible, betraying his eagerness. Bakugou just enjoys the hasty show — very clumsy, but the alpha certainly makes up with what he has to offer. The clothes really, really don’t make Deku any justice. 

He has thick, strong thighs that tell Bakugou the little nerd works out more often than he expected. And they go together with thick arms, broad chest, solid abdomen... Deku is thick all over — including the angry red cock, dripping on his stomach. The freckles on his face and shoulders give an angelic flair, contrasting starkly to everything else on Deku’s body, like the thick body hair he has in his arms, legs, and lower abdomen.

Katsuki can’t wait to teach everything he can to the young alpha.

“Come here,” he says, patting the space next to him. Eagerly, Deku climbs back in the nest. Katsuki pushes him so the alpha lays down, presenting himself like a feast for him. “I’m gonna take good care of you, Deku,” he says, letting his hands caress Deku’s belly, slightly brushing his dick. Deku moans, and Katsuki smirks. “I’m gonna teach you all sorts of things...”

“Mi-mister Bakugou“, Deku whines when Katsuki runs a finger over his knot.

“No, no... No more of that... You’re about to knot me in my nest, Deku... I think it’s about time you call me Katsuki...” 

Deku looks at him with those watery, bright green eyes and whispers, “Ka-Katsuki...”

“Yes, good boy...” He whispers back, cupping the alpha’s cock. “Tell me what you want, Deku.”

“Y-you... I want Katsuki...” Deku pleads. “Please...”

“So polite,” Bakugou teases, already climbing on Deku to straddle his waist. “I know you want me, though... I’ve noticed you watching me in the office...”

Deku gasps when Bakugou sits down on his belly, letting the alpha’s dick rub against his ass.

“Pretty... Katsuki is too pretty...”

Bakugou laughs, “pretty?”

“And sexy and- and-... Powerful.”

To be called powerful while sitting on top of Deku like that makes Katsuki shiver in delight. He runs his hands over Deku’s chest to make the alpha shiver as well.

“And you like powerful omegas, Deku?” He asks, almost taunting. “Want to make them submit?” 

“No!” Izuku interjects. “I-... I want-...” Deku stumbles on his words as if he doesn’t know how to explain it. And then he gives up on words and tilts his head, showing his neck in submission.

“Fuck,” Bakugou curses under his breath because that’s the hottest sight he’s ever seen. To have such a strong, young, virile alpha all pliable to him, absolutely at Katsuki’s will, is more than a gift.

Bakugou leans over, laying totally on top of Deku and licks a fat path on the alpha’s neck, straight over his gland. Deku’s taste explodes in his mouth — it’s fresh and musky and perfect. Bakugou can’t help but suck on Deku’s gland to get as much of the Alpha’s taste as he can, and Deku squirms under him in pleasure.

“Ahhn~! Katch- ahh!”

Katsuki clamps his thighs on Deku’s waist and forces Deku’s shoulders down, keeping the alpha held under him. 

“I’m gonna wreck you, Deku,” he growls against the alpha’s neck.

“Please,” Deku cries, offering his neck even more.

It’s a big temptation just to give in to his primal instincts and take a big bite on Deku’s gland, binding the delicious alpha to him, but Katsuki knows better than that. To calm his urges, though, he reaches back for Deku’s cock and aligns it to his hole. Deku’s hands shoot up to his waist, grabbing onto Katsuki for dear life.

The young alpha’s hands are so big that they almost touch, going around the circumference of Bakugou’s slim waist. Why the hell does a nerd like Deku have such freakishly large hands? And why the hell that’s so hot? Knowing this alpha could easily win in a fight and pin him down, but he chooses to offer himself for Bakugou is incredible, and Katsuki doesn’t think he’ll ever get over it.

Katsuki feels more slick coming out his hole, he’s ready. Slowly, he sits down on Deku’s cock, feeling every inch of it spreading him open and filling him up. His eyes roll back to his head as the sensation of the alpha’s thick, warm dick makes him completely full.

Not one of his toys could reproduce the searing heat of an alpha inside him.

When Katsuki manages to look down, he sees Deku with an expression of absolute bliss. He has his mouth open in a silent ‘Oh,’ and he looks at Katsuki as if he’s seeing God’s face.

“You like this, Deku?” he taunts, moving his hips just a tiny bit.

“Ye-yeah,” Deku whispers reverently.

“We just started, baby...” Katsuki smirks. “You better don’t blow your load before I’m satisfied.”

“I- I won’t! I’ll do anything for you!” Deku promises, breathlessly.

“Right answer.”

Very slowly, Bakugou starts to ride him. He knows better than to believe Deku’s good-intentioned promises. The alpha looks close to popping his knot just by having his cock sheathed inside Katsuki. So he takes his time, barely moving his thighs and working only his hips on Deku’s cock.

Even with the little friction, Deku’s dick is large and thick enough to rub him in all the right places, and to have the young alpha’s eyes watching his every move, enthralled, brings another level of pleasure to the act. Bakugou also loves how wide his legs are spread since Deku has such a thick waist. It’s almost like riding a bull, which he finds much better than the stallions he has had before.

Katsuki’s hands decide to take advantage of the position to rub Deku’s chest and abs. They feel good, warm, and solid under Katsuki’s fingers. He enjoys the feeling of Deku’s thick trail of hair under his belly button, and how his dusky nipples are hard as pebbles. Going up, his hand wraps around the alpha’s neck... Or tries to. Deku’s neck is too thick for Bakugou to really wrap his hands around him. Not that he even needs to, when he gets his hands close to Deku’s neck, the alpha tilts his head offering him even more room to explore.

Bakugou has never felt an alpha’s pulse on their neck because no other alpha would let anyone hold them in such a submissive and dangerous position. Deku, however, just whimpers as Bakugou caresses his scent gland, releasing more of the aroused pheromones that already fill the room and cling to their skin. 

“Fuck… You really like it...” Bakugou says in awe.

“I really like you,” Deku answers with a strained voice, his neck bobbing under Katsuki’s hold.

Katsuki sits down harder on Deku’s cock, knocking the air out of the alpha’s lungs as he moans. “I’m gonna give you even more things to like,” he whispers sinfully. 

One of Bakugou’s hands keeps going up until it reaches Deku’s mouth. Without a thought, he sticks two of his fingers in to make the alpha suck. Deku doesn’t seem to mind, though, as he sucks and licks the fingers as if they were made of honey.

“Didn’t grow out of your oral fixation, nerd?” Katsuki teases.

“You taste good,” Deku answers awkwardly since Katsuki’s fingers are still in his mouth.

Bakugou chuckles and takes his fingers off. If Deku likes it so much, he’ll give the alpha a proper taste. He reaches back until he can touch the base of Deku’s cock and follows it until his fingers touch his own stretched out rim, which is taking inch by inch of the alpha’s thick dick. There, Katsuki’s slick merges with Deku’s pre-cum. Bakugou collects the mess of fluids and brings it back to roughly shove three soiled fingers in Deku’s mouth.

The alpha eagerly licks it all clean, moaning around Katsuki’s fingers. High from his lust, Katsuki starts fucking Deku’s mouth with his fingers, even making the alpha gag slightly. Deku’s debauched look is so incredibly sexy that Katsuki picks up the pace of his hips without noticing, desperate to feel that cock fucking him as roughly as he was fucking Deku’s mouth.

“Fuck yeah, take it, baby... Next time, I’ll fuck your mouth with my cock.” Izuku whines and bucks his hips up, forcing Bakugou to clamp down his thighs on him. “Oh, you want that...” Deku nods, drool coming out of his mouth. Katsuki leans in and licks his face clean. It’s messy and dirty, the best sex Katsuki ever had — and he wants more. “Let’s see what you’ve got, big boy,” he whispers next to Deku’s ear. “Fuck me.”

On command, Deku plants his heels down on the mattress and starts using his powerful abs and thighs to fuck up into Katsuki’s eager hole. Slick squirts off him at the feeling of Deku using his big hands to hold Katsuki’s waist to keep him in place and fuck him. The room fills with sloppy, wet sounds of Deku’s cock impaling Bakugou’s extremely wet hole.

“Oh fuck-! Fuck yeah, Deku,” Katsuki cries in pleasure. “That’s how you fuck an omega! Shit-”

“Katsuki- so fucking tight-” Deku cries, mindlessly pounding into Bakugou.

“More, Deku! Shit- give me more!” Katsuki demands and Deku tries to deliver, but their position doesn’t give the alpha much freedom of movement. If Katsuki wants to be fucked like a bitch, he’ll have to act like a bitch.

One powerful thrust that makes him see stars gets Bakugou to make up his mind. Quickly he pulls Deku down back to the bed, and while the alpha is confused, Bakugou gets off his cock and presents himself to Deku, face down and ass up in bed.

“Breed me, alpha,” he orders, wiggling his ass to Deku.

It takes a second before he feels Deku’s cock split him open harshly as the young alpha mounts him with purpose. Their moans fly around to the point that Bakugou can’t really tell which ones are his and which are Deku’s. Katsuki’s prostate is roughly hammered with the need and stamina that only a twenty-something years-old alpha can muster, and he loves every second of it. Deku’s big hands squeeze his hips with such strength that Bakugou is sure he’ll proudly sport the marks for the weeks to come.

Katsuki is so lost in the pleasure, he feels his orgasm building up without even touching his cock. His dick hangs ignored, rubbing over his own abs and dripping pre-cum on the bedding. Katsuki thinks about warning Deku or demanding the alpha to jerk him off.

But then Deku pulls Bakugou up by hugging his chest and latches his mouth on Katsuki’s scent gland, sucking harshly on it. At the same time, Deku’s hands fondle his chest, pinching his nipples. The combination of sensations drives Katsuki crazy, and he keens in pleasure for Deku. With a loud cry, Katsuki cums hard and long, wave after wave of pleasure that Deku makes him ride out by keeping fucking him.

The strength of his orgasm makes Bakugou’s hole clamp down on Deku and forces the alpha to pop his knot. Deku cries and trembles, as his hips do aborted thrusts inside Bakugou. He can’t really move since his fat knot properly seals them together, but Katsuki can feel Deku reaching for every last bit of friction he can until they topple off in bed, entirely spent. 

Izuku rolls them to the side, to not crush Katsuki, and hugs him against his chest. Katsuki is still a little dazed from how intense his orgasm was, so it takes him a while to notice that Deku keeps licking his neck, ears, shoulders, and anything he can reach. The alpha’s hands also keep mapping his chest and thighs. Bakugou is sure that if Deku’s knot wasn’t preventing it, the alpha would still be fucking him — not that the second Deku’s cock gets freed, Katsuki won’t be served another round of delicious sex.

“You really are a fast learner,” he jokes, chuckling.

“Kacchan is too cute and perfect,” Deku states, without stopping his kisses.

“The fuck? How the hell do you go from Mister Bakugou to Kacchan so fucking quick, brat?”

“You told me to not call you Mister Bakugou… And you’re so cute that Kacchan fits you,” Izuku says, rubbing his cheek on Katsuki’s.

“I’m not fucking cute,” he huffs.

“Kacchan is even purring… So cute,” Deku says, smiling at him.

Katsuki rolls his eyes and decides to not dwell on the fact that he is, in fact, purring. “You're lucky your cock is so good, or else I’d fucking kick you out,” he threatens.

Deku only croons back at him, hugging him tighter. For now, Bakugou decides to allow it. Deku’s rut will probably go on for two more days, giving them a great weekend ahead.

What will be the future of their professional relationship, Katsuki can decide after this weekend. 

After all, it would be cruel to kick the rutting alpha out of his nest now... When Deku’s next wave of rut comes, Bakugou must be around to help the young alpha ride it out in the most delightful way possible.

 

Notes:

I decided to edit this thread for AO3 after finally understanding what the word 'simp' means xD
I hope you guys had fun reading it! And yeah, I still have plans to adding a second chapter to this AU, but I honestly have no idea when that is going to happen since I have way too many projects going on right now.