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saturday, all day. various rooms, in an underground club, somewhere in japan.

Summary:

Ritsu moans around her sister's cock, shoved deep inside her mouth. It feels heavy and rough over her tongue. She tries to force her eyes open, but her eyelids keep falling as Rei thrusts with erratic movements against the back of her throat.
Ritsu can hear Rei say something. Her sister's hand feel warm on her head. Her fingers massage Ritsu's scalp with a tranquil, quiet pace that makes Ritsu go slightly mad. She thrusts her fingers deeper inside her pussy. She just came; her walls feel puffy, making it somehow hard to push deeper.

"My moonlight..." Rei moans, and Ritsu finally manages to keep her eyes open long enough to stare into her sister's bloody red eyes.

Notes:

it took me months to write this because my work is literally hell.

anyways, heads up if you dont want to read fem ritsu having some weird harassment section on male koga. its in part 2. also this koga is technically a homo but every koga will have a thing for rei sakuma. no koga can control it

also more details on the au. adonis isnt in undead. he does some normal ass job like idk. being a butcher. working for a meat restaurant. being a delivery boy. whatever you want. UNDEAD is also not an idol group but an underground rock-ish band. and the sakumas are made to pretend they are males. but they are evidently not. have fun

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

Work Text:

1.

Kaoru's fingers move lazily on the chords of his acoustic guitar. He insists on bringing it to practice, despite hardly being able to play it; her sister didn't allow him in the group to play anything, anyways, and it baffles Ritsu how he keeps the old thing around without it having any real purpose.

"Kaoru-kun," Rei's voice is mellow; it tastes like a fluffy sponge cake, if sponge cakes were hornier. Ritsu purrs, stretching all over her sister's lap. "While I appreciate your tenaciousness, would you be so kind to—"

"Cut it with the dirge, asshat. You can't play the thing; it's cryin’ for ya to stop!" Koga roars, as he is unable to interact with people without exploding like a rising star. Ritsu likes him: she chuckles, lips turning upwards in a cheshire grin. Koga is always so innocent, so naive, so pure. There are few things Ritsu enjoys more than pestering him, and solely but steadily staining his bright white soul with spots of soiled black.

Rei pats Ritsu's head. Her fingers thread lightly over her nape, intertwining with a few rebellious locks. Ritsu raises her head just slightly, to look at her sister’s intense burning red gaze. *Ah*, but Ritsu's favorite thing will always be her oneechan-not that said oneechan needs to know. Ritsu lets her tongue out just slightly, and licks her bottom lip in a way she knows her sister cannot resist.

Rei smirks as a ghost of a feeling Ritsu knows all too well dulls her fiery red eyes.

"Rei-chan!" Kaoru pouts, indignation clear in the way his voice raises. Ritsu has no particular thoughts on Kaoru. She doesn't even think he looks that attractive–to her tastes, Koga looks better. If she had any say in who got to be the center of UNDEAD, she surely would've given Corgi-kun that spot. Or, she would've chosen someone else—doesn't that Hibiki-kun that is friend's with her sister look better than this dimwit, anyways?

Ritsu lets her eyes wander. Koga stands up from where he was tending to his own guitar, the only lady he will ever love, he says all the time. Ritsu's lips curls upwards again; Koga's pants are nicely tight, wrapping perfectly around his ass. That other guy, Kaoru, he stands up as well; he too is wearing similar pants, black leather (admittedly, all of them are wearing the same thing, their stage outfit), and he starts arguing adamantly with Koga about—Ritsu doesn't care. She can make the shape of their half hard cocks clearly from their pants. She wonders if guys are always half hard.

"Aneja," Ritsu raises from her sister’s lap, only to let her body weight fall on her side, and rests her chin on Rei's shoulder. "Aneja, they are being to~oo loud..." Ritsu yawns, and closes her eyes. Those two can keep arguing on their own. She doesn't care. Rei smells like camelias in winter—whatever that means.

"Now, Ritchan..." Rei pats her sister's head, voice as low as a whisper. "Let them be. You know this is how they like to interact with each other."

Ritsu hums, and lets herself be lulled by her sister's voice humming a foreign tune to accompany her dreams.

 

2.

"Coo~rgi-kun..." Ritsu's voice is loud as her tiredness allows it to be (which isn't loud at all). She approaches Koga from behind, as he is polishing his beloved guitar and getting ready to stand on stage. "These pants are really horny, y’know?"

Koga scoffs. He has grown accustomed to dealing with Ritsu's weird games. Ritsu finds it amusing. He can try to resist her advances, but when all is said and done, Koga is still Koga, which means he is still the type to blush and throw a tantrum when Ritsu's hand squeezes his ass and she whispers something extremely dirty in his ear.

This time, leather pants packing Koga's cock in a nicely wrapped box that does a terrible job at hiding what's inside, Ritsu lets her head fall on Koga's shoulder. The guy may not react verbally (for once), but Ritsu isn't privy to how his body tenses as hers gets closer, her small breast rubbing against his back. Ritsu wraps her arms around Koga's chest, and slowly, as she breathes against his ear, her hands travel all the way to Koga's crotch.

"Ritcchii, what the fuck are you—" Koga hisses as Ritsu's fingers close around his clothed cock. Ritsu likes the way it immediately hardens as she starts massaging it, cupped hand squeezing and moving slightly in small circles.

"Ahh, Corgi-kun, why are you so hard?" Ritsu singsongs as she tries to mimic her sister's mellow voice, and she feels her pussy leak as the memory of her sister's voices fills her brain. Rei's voice, so sweet and enticing, so mesmerizing; if Ritsu had a cock just like Koga, it would definitely grow terribly hard, the tip hard and leaking, crying desperately for her sister's attention.

"Ricchi." Koga's straight tone tears Ritsu from her fantasy world.

"Hm?"

"You are dripping saliva all over my fucking jacket." Koga scoffs, annoyed. "Are you thinking about your sister again? Fucking hell. You are disgusting, you know that?"

"Aah..." Ritsu grins, and moves to lick a wet patch of saliva from the bottom of Koga's neck to his jaw. "I am, I am... but Corgi-kun, aren't you disgusting too?" Ritsu bites on Koga's lobe, and pulls just enough so that a shy whine escapes Koga's lips. Her hand squeezes around Koga's crotch more firmly.

"Don't you want to see it?" Ritsu whispers, as her free hand moves to tease one of Koga's nipples. He is wearing a light cotton t-shirt below a heavy leather jacket—a must for any respectable rock band outfit. With light cotton t-shirt, rubbing a nipple with one of her neatly trimmed fingernails becomes incredibly easy. "Do you want to know how my sister fucks me, after we are done with a live?"

Koga's eyes turn to stare at something to their left. Ritsu doesn't care what that might be. "Do you want to know what she says when she thrusts her fingers inside my wet pussy?" Ritsu chuckles, her teeth grazing lightly on Koga's neck.

"Ritchan, that's enough bothering our wanko, wouldn't you agree?"

Ritsu finally turns to stare at what caught Koga's attention. Her sister's body is leaning against the doorframe to their shared dressing room. Her outfit isn't different from Koga's: leather pants that wrap nicely around her full thighs, a light white cotton sleeveless t-shirt, a bandana wrapped around her arm. She is wearing thigh high black boots with an amazing high heel, and Ritsu truly wonders how it is that her sister can stand on those thin things. Her full breasts are hidden by a binding, yet Ritsu knows they are there, and can't help the warmth she feels pooling in her belly.

Ritsu sighs, and let's Koga go. Kaoru smirks from behind her sister, his hair annoyingly shimmering below the artificial light of the dressing room.

 

3.

Ritsu finds her own binding annoying to wear. It squeezes her breast, and makes it hard to breathe. When their manager first made her wear it, she whined and repeatedly tried to remove it. Rei had to kiss her nape, whispering in her ear that it was necessary, that she looked so handsome, that she would've made all the girls swoon for her. Ritsu said she didn't care, because she only wants her oneechan's heart, she only wants to be pretty and handsome for her oneechan. Rei said she would always be pretty for her oneechan, and then kissed her on her lips, and Koga gasped and Kaoru shrugged, and Ritsu said it was ok, that she would wear the binding for her oneechan.

As she stands on stage, mindlessly playing on her bass in perfect harmony with her sister's drums, Ritsu sometimes lets her eyes focus on the screaming crowd in front of them. There are many girls shouting things she can't clearly make out–she knows most of them would be screaming Kaoru's name, some Koga's, many Rei's. She can hear her own name sometimes, and all the times when she does, she grins, and winks for good measure. If she has to play the male rockstar part, she'd rather do it to the fullest.

Kaoru bends over his mic's stand, words falling from his lips a promise of a dreamy adventure of love. Ritsu thinks the lyrics to their songs are quite–cheesy, to say the least. Kaoru says that this is what he wants to sing about. Kaoru says the ladies love a good cheesy rock song about love, and Ritsu thinks he's too full of himself, but Rei nods and writes him yet another one of these annoying song—at least, Ritsu thinks, they are upbeat enough that playing them is always quite the challenge.

Finally, Kaoru's singing stops. Koga moves to the center of the stage, fingers moving fast on the chord of his beloved as he expertly perform his solo. Ritsu nods her head to the beat, and moves behind him, her bass a shadow to the loud screaming of his guitar. Koga turns to his left, and quickly Ritsu moves so that their backs touch, and they are suddenly the only ones on the stage. She plays her bass to perfectly complement Koga's outburst, his sermon to the world, the manifesto of his rage, of his affection, of his heart full of an energy he doesn't know how to deal with. Ritsu calmly shows him the way: the steady rhythm of the bass takes him by his tiny, trembling hand, and together they walk through a dark tunnel that leads to a world of light, where flames burn as bright as the undying sun.

Rei signals the end of their moment with the crashing of her plates. Koga turns to face Ritsu; at the same time, Ritsu turns to face Koga. The golden eyes of an hyperactive puppy meet her with a caring smile. Ritsu sticks her tongue out before retreating to her position, right in front of her sister's drum set.

Kaoru sings the last words of their song, you are a woman, i’m a man, this is more than just a game, i can make you feel so right, be my lady of the night, and Koga's guitar finally falls silents.

 

4.

Ritsu whines against the dirty wall of the bathroom stall of the club UNDEAD often plays at. There is a phone number neatly scribbled in black ink right in front of her eyes; below it, a messily drawn ejaculating penis and the words CALL FOR HOT MILF SEX! on which Ritsu can’t help but focus her attention.

She whines, needy, a wordless demand for more. Rei’s mouth hovers over her skin (she can feel her sister’s breath on her shoulder blades, and Ritsu imagines Rei’s tongue slipping out, sensually leaving wet cat-like laps on the pristine skin; she imagines Rei’s lips caressing her skin, before opening up to reveal her sister’s sharp canines, and suddenly Ritsu remembers how they shine so brightly and deadly under the fake lights of the club UNDEAD often plays at. In Ritsu’s imagination, Rei’s canines sparkle below the neon blinding lights before sinking deep into Ritsu’s neck, and the pleasure she remembers is so intense Ritsu can feel her pussy throb and wet her panties).

“Ri~tsu…” Rei’s voice is barely audible over the loud beating of the pounding drums of house music that surround them. It doesn’t matter; Ritsu would be able to hear her sister’s voice even if she were to lose the ability to hear entirely.

Rei’s sharp and bright canines do not sink in Ritsu’s succulent neck. Instead, her lips kiss it gently, at a pace infuriatingly slow. While Ritsu jerks her body so that her ass grinds against her sister’s pubis, Rei’s hands cup her breasts, albeit with no intention of doing nothing else but get a feeling for their shape and fullness.

Ritsu sighs. She pushes her body backwards, forcing her torso on the wall in front of her. She wants more–she knows Rei is aware she needs more.

“Why aren’t you fucking me yet?” Ritsu bites when Rei softly bites her neck, as her hand keeps squeezing Ritsu’s left tit. Ritsu turns her head so that she can see her sister’s red eyes darkened by a hue that never fails to make Ritsu shiver.

“Is my sweet little sister,” Rei whispers, and leaves a kiss where she bit a glistening red hickey, “the fairest of all angels in haven, the most enticing of all demons in hell, the most humbly beautiful human on Earth—”

Ritsu groans. “Stupid ane—ah-!

Ritsu can feel Rei smirk as she suddenly presses two of her digits on Ritsu’s clit.

“—ah, but isn’t she stubbornly impatient too.”

Rei’s fingers press more over Ritsu’s panties; Ritsu closes her eyes, finally getting what she had whined for. She nods, unable to resist the urge to completely surrender to her sister’s control. Rei’s voice reverberates in the small area that is the bathroom stall they hurriedly occupied as Ritsu pushed her sister closer, forcing their lips together, her tongue desperately looking for the sweet taste of her sister’s. As Rei’s fingers start rubbing in a circular motion and the fabric of her panties frustrates and arouses Ritsu all the same, she can’t stop herself from moaning her sister’s name.

“Ne-neechan...”

Rei chuckles, composed as Ritsu never even fake being. Ritsu sighs; she feels like crying, she whines, she calls her sister’s name like a gospel, and finally she drops a hand to cup her breasts, pinching her nipples messily, absent-minded with her whole attention focused on the way her pussy throbs, seemingly moaning herself a plea to be filled.

“Much better, my moonlight,” Rei whispers in her ear, as her free hand reaches to intertwine her fingers with Ritsu’s, and teach them how to properly pinch at Ritsu’s hardening and reddening nipple. “Be a good whore for your neechan, tell her how much you want her cock deep inside you...”

Ritsu nods, pushing her body backwards again in hopes to feel the size of her sister’s strap on. Normally, she wouldn’t allow herself to sound so desperate; normally, she wouldn’t be leaning over a disgusting bathroom stall, spreading her leg even further to welcome her disgustingly *attractive* sister’s fingers, as they slide from her clit to tease her throbbing entrance. But Ritsu feels so hot, so *wet*, and the music is so loud, hypnotizing in the way it repeats all the same, a psychedelic sound that makes Ritsu yearn for numbness. Rei’s fingers stop teasing, finally digging deeper into Ritsu’s insides. Her neatly trimmed nails scrape at Ritsu’s sweetest spot, and Ritsu has to bite her lips hard not to lose control so soon.

She can hear someone else scream in the bathroom stall next to theirs. High pitched, laboured, and it matches well with the pounding beat and the evident sound of balls slapping against skin the comes right before and right after her moans. Ritsu lets her head fall, and her eyes focus on the dirty pavement she stands on. Her sister had lowered her panties; Ritsu can see the wet spot on the white fabric. The sight alone arouses her.

“Ah, sweet Ritsu…” Rei whispers in her ear, yanking her attention back towards her. Ritsu sighs. “I will make you scream even harder,” Rei licks her neck, and before Ritsu can groan a witty response, Rei retreats to align her strap on with Ritsu’s pussy.

The fat head strokes Ritsu’s entrance, and Ritsu pushes her body without thinking so that it sinks inside even before her sister can consciously thrust inside.

“F-fuck..!” Ritsu groans as Rei finally sits the entirety of her cock inside her. She knows the size. Ritsu is well accustomed with Rei’s taste in big cocks—or rather, Rei’s taste in having her sister cry from the impossible size she forces her to take. The feeling of being so entirely overtaken by Rei makes Ritsu shiver, and lose all semblance of self-control she had left.

“God, fuck, Neechan, move, now, I’m—” Ritsu doesn’t wait for Rei to start moving. She leans back towards the wall, sighing as she feels Rei’s cock slide away from her insides. She licks her lips, letting the tip rest at the edge of her entrance, feeling the way its fatness forces her pussy to stretch wide open.

Ritsu can feel Rei chuckle. Her sister leans closer to her, bites her neck like human, sensually but with no intent to drink yet. Instead, she moves her finger to tease Ritsu’s anus, “Do it yourself,” Rei’s finger pushes inside, slowly, an accompanying side to the main course; “Show your sister how hard you can make yourself cum on her cock.”

Ritsu closes her eyes, and pushes back towards Rei’s body, fucking herself on Rei’s cock as her sisters lazily fucks her ass. The overstimulation quickly makes her space out, and she doesn’t even fully realize the way her body picked up a faster pace, or how she starts incoherently scream her sister’s name, how it meshes so perfectly with the music that Rei herself starts moaning from seeing her sister coming so fully undone.

“Ritsu, Ritsu—” Rei calls her, but Ritsu can’t hear her. She’s surrounded by club music, sound of cock slapping against skin, and the squelch her own pussy makes as Rei’s strap on dives deeper inside, as it retreats back, and inside again—Rei bites her, finally, God, Ritsu thinks as she hurriedly forces one of her tits outside of her bra, pinching it hard, the stimulation not nearly enough. She feels her eyes lose focus. She feels Rei’s teeth sink within her tender flesh, she feels her blood rush and her heartbeat pound to the beat of the music as Rei sucks, as Ritsu slams herself against her cock, as Rei pushes what have become two of her fingers deep inside her ass.

“A-ah—!” Ritsu yanks her sister’s hair, hard, until Rei stops drinking for her and her head raises to stare into her younger sister’s lust-clouded red eyes. Rei’s lips are red with blood—Ritsu kisses them, licks all the blood from them and moans inside Rei’s mouth when the taste of her own blood takes over and meshes with her sister’s own taste. She claims Rei’s tongue like it has always meant to be hers to have.

“Ritsu—” Rei whispers inside her sister’s mouth, eyes glistening an ember shade of red. Ritsu kisses her again, and again, and again until she’s out of breath and cumming on her sister’s cock.

— -

5.

‘Then she forced me to kneel and shoved her cock inside my mouth.’

‘Like it was so dirty on the floor and I wasn’t wearing pants’

‘🤮’

‘And her cock was still wet with my cum? It was weird. She fucked my mouth so hard bro my throat is still sore… I couldn’t understand jack shit I barely remember it’

‘Zzz’

Koga stares at his smartphone as the messages appear on the screen, one after the other in quick progression. Ritsu is still typing. Adonis yawns behind him, and without think Koga’s body leans more into him, comforted by the sturdiness of his wide shoulders.

“Oogami.” He says, voice deeps and clear over the voices coming from the show they are watching on TV.

“You OK?”

Koga turns around. “Y-yea.” He replies, lying, and Adonis notices, because he always does, and because Koga only gets this red on his cheeks right below his wide eyes only when the Sakumas are involved.

Koga locks his phone, throwing it someplace on the sofa. He can hear it vibrate with new messages. He closes his eyes and imagines Rei with a real cock, then shakes his head vigorously when the image before his eyes becomes too real.

Adonis sighs, and kisses his head.

“Those two motherfuckers…” Koga whispers to himself before forcing himself to focus on the show once again.

Notes:

if you liked this leave a comment. if u dont want to leave a comment its ok. im @ kiapollos on twt when im not working. i like talking about all kinds of incest!