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cckaisen · 9 months ago

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୨ৎ˙⋆.˚ ᡣ𐭩 𝓑𝓡𝓞𝓣𝓗𝓔𝓡 𝓕𝓤𝓒𝓚𝓔𝓡, sukuna ryomen !

boyfriend’s older brother!sukuna. while little bro yuji spits up his liquor in the bathroom, sukuna takes care of his girl, finally fucking her like she deserves.

ಇ. summary. sukuna brother au, fem reader, infidelity, yuji throws up so emeto. warning, manipulation, pussy slapping, biting, some predator/prey elements, size kink, dumbification, squirting, reader is intoxicated but aware, rough kuna but he switches up:3, regret/moral conflict, angst towards the end cuz ‘m a certified yapper. wc, 4.6k.

ಇ. note. been a whore for sukuna lately but i fully blame gege for drawing him so majestic. if evil then why gorgeous, hm??? we’re onto u gege. we know u love a felon. confess already.

the door to the itadori household bursts open and in floods a typhoon of drunken chaos and laughter.

drowning in giggles, yuji has his arm thrown over your aching shoulders, humming along to some kind of song. without you, he wouldn't be upright—a jumbling, intoxicated mess.

you're mostly sober, fighting to get him to the bathroom since he was heaving in the taxi.

"whyyy do ya build me upp~" he slurs, a bumbling flurried version of himself, smothering your cheek in wet kisses that have you wriggling away. "butterrrcuppp baby, jus' t'let me downnn...!"

"yuji!" you shriek, the weight of him growing more unbearable as you try to keep him up. his breath is drenched with the heavy scent of liquor. "baby, y'gotta focus or we're not gonna make it to the—"

"—and mess m'rounddd!"

"yuji—'nuff!" you groan loudly as he drapes himself over. at this rate, you might just collapse into a heap on the floor, overcome by his weight as well as the lesser, still relevant amount of alcohol you consumed at the club.

suddenly, the patter of footsteps have you perking up. sukuna—yuji's big brother—rounds the corner, gaunt features sharp with agitation. he must've woken up when the two of you came barreling in.

"sukuna—hi," you can't help the relief that bursts through your chest, evident in the way you exhale.

sukuna notes the way your knees tremble, his brother blabbering embarrassingly on top of you. he puts aside the urge to laugh, figuring he'd spare you just this once.

"here. i got 'im." without any trouble, sukuna drags his little brother under his arm, putting your strength to shame. with the weight lifted, you finally have chance to relax, rolling your arm and letting out a loud sigh of relief.

"thank you. ow—pain."

you stumble, and the broader of the two brothers chuckles, crimson gaze soaking up your body in that dress while you're distracted. "you carried him all the way home?"

"mhm. practically sprawled out on my lap in the taxi. the driver and i had to team up to get him outta there," you whine as you kick off your heels. those stupid things had you wincing terribly most of the night. yuji said they were sexy. as much as you love him, you’re more than sure you will not be wearing them again anytime soon.

"you should've called me." sukuna's features scrunch in disgust as yuji keeps singing in his hold.

"i-i-i neeeeed youu~"

"fuckin' a, did he drink the whole bar?"

"pretty much," you reply, shrugging off your coat and following behind the pair of brothers. yuji looks so funny, almost small despite his lean stature, looking deceivingly short compared to sukuna. "he made a bet with todo and lost."

the sober man grunts as he knocks open the bathroom door, holding up yuji in his other arm. his muscles flex underneath his shirt, stretching the dark cotton, where your eyes briefly linger.

you avert your attention to yuji instead, amusement melting into concern for your boyfriend.

not sharing the same sentiment, sukuna drops him down by the toilet, putting up the lid with a smack and purposely shoving yuji's head into the bowl a little harder than necessary. "theree ya go, dumbass," sukuna grunts, slapping his back as he finally pukes up. "just barely made it."

and you're sure glad he did, thanking the gods your dress had been spared amidst the drama. with the way he'd been acting, you were never sure that you would be safe from the bile climbing his throat, cringing fearfully at times.

you feel much better now that sukuna has taken over. he's older, well-versed in trivial matters like this. yuji's already told you all about his university days, the drunken nights, the fighting—

you curse your thoughts for sprawling so suddenly, shooing off your rodent-like curiosity.

their relationship struggled at times. especially so back then, but things are different now. and as much as sukuna pretends not to care for his little brother, he clearly does, at least a little. after all, the pink tresses of your boyfriends hair are ruffled in his thick hand before he lets go fully.

then sukuna walks on in a rugged stride, leaving yuji to it. on the way out, he knocks your shoulder with his. you can't tell if the action was playful, but you’re sure it wasn't hostile, at least. a little smile creeps onto your lips as your gaze follows him into the kitchen.

sukuna is weird.

he's weird because he's not like yuji in most ways; it's not necessarily a bad thing, but he's much, much harder to see through. with your boyfriend, most things are crystal clear. you can tell what he wants, what he needs, how he needs it. he'll tell you all about it—unselfishly, of course.

however, sukuna, you find, never reads so easily. and it's weird. you can't tell if you prefer it that way, or if you'd rather know what he's thinking.

especially since you're certain you just caught his eyes slithering along your curves.

anyway.

wanting to give yuji some privacy, you pull the door shut, the sound of his gags growing muffled. you half-jog-half-limp to the kitchen, preparing a glass of cold water to ease his throat once it's all over.

unbothered, sukuna leans his back against the counter, scrolling on his phone like this is just another night to him. it's weird.

you start wondering, drawing up the conclusion that this might be first time you and him have ever been alone, in a way. yuji is there, but not really, if you know what i mean. not mentally, anyway.

before you can finish that thought, you deliver the glass to yuji, crouching down to his level and rubbing his back with careful affection. "got you some water, baby. right here, by your hand." you take it gently, guiding it towards the glass.

he's not throwing up so much now, just laying there, waiting for the next wave of nausea to crash over him. his fingers respond to the glass, wrapping around it. "thanks, hic—y're so good t'me..."

you smile warmly, pressing a kiss to his warm cheek. you couldn't care less that he reeks of all kinds of concoctions and puke all rolled up together, wanting to be there for him regardless as you know he would for you.

you whisper a few more reassuring words to him before taking your leave, giving him some time to recover by himself. the bathroom door clicks shut. forgetting all about the third party, you let your back press against it, head jilting as a sigh slips out.

"he worn ya down that much?" sukuna snorts at the display, looking up from his phone.

despite your initial surprise, you laugh too. "he doesn't usually. it's just... been a busy night, i guess. i think he'll pass out in there."

sukuna briefly dips his head into the fridge, getting out a chartreuse-tinted bottle of something. "one would hope. you want one?"

"you're being weirdly nice." you blurt suspiciously, smirking. oh god. maybe the alcohol was starting to work you over, too, because you definitely weren't supposed to say that. sometimes it's better not to ask, someone told you once.

sukuna pulls a face that makes you wish you could crawl out of your skin on command, even though there's technically logic behind your last words.

"am i usually mean?"

"n-no, i just mean—" fuck, stop talking. with growing embarrassment, you shake your head, "nothing. sorry. that was assumptive."

the way you initially scrambled to answer appealed to some wicked humor in him as he laughed. "yeah, it was. so yes or no?"

"yes," you sigh, shoulders slumping in admission, knowing you probably needed it. especially after whatever that was. your head is pounding—god, someone should put me down.

sukuna opens up your bottle with his teeth as you hop up on the counter, watching each other. all had gone quiet behind you. sukuna handed you the drink with the lid still between his teeth, venom swirling in his eyes when he saw the way yours lingered on the gesture.

slowly, you took the bottle, pressing the rim up to your lips before taking a sip. it bubbles in your mouth, sparkling on your tongue before you swallow it down. the burn is a little unpleasant, but you manage.

"any good?" sukuna asks.

"'s okay," you shrug, reading the bottle, pretending like any of it made sense. "a little bitter."

"you like 'em sweet?" the taller man frowns, sorting through the cupboards for something that you're too immersed to ask about.

"kinda. but too much makes me sick," you explain, scrunching your nose at the thought. "i like a balance."

"oh, really?" sukuna snorts as if you've just said the funniest thing in the world.

in one confused motion, you lower your brows. and jilt your head, wondering what's with the sudden jest. "yeah, uh... is that funny?"

sukuna raises his brows, shaking his head, some glasses clinking. "no, not funny. nothin's funny."

he really knows how to make a person feel small, you'd give him that much.

you avert your gaze, heart crawling up into your cheeks. "okay, well..."

"what about you?" he interjects, sparking up another tiny bit of annoyance in you again. not that you knew what you were gonna say anyways. it most likely would've been embarrassing anyway, making you shrink even more, wanting yuji to come out already—

"what about me?" you wonder, your voice meeker than before. curious and cautious, tip-toeing around his words. is there something you're hiding?

"are you the sticking-around or screwing-around type?"

"oh, right," you laugh, making sense of his question. it's big one, though. kind of sprung on you. still, you manage to respond, just telling him what you know while glowing with intoxication, "well, we've only been going out a couple months."

you're more focused on the way he's watching you than you are on actually answering. his eyes are sharp and torrid in comparison to his little brother's, and the way he gazes down rather than looks at you has something in you stirring, writihing hotly beneath your skin.

it's exciting. why is it exciting? there's a giddiness that gyres in the pit of your gut like a ballerina, pirouettes and grands jetés, heat cooking and simmering through your veins. it's terrible. it's weird.

"well, you can't blame me for being protective." sukuna shrugs. "he seems to really like you."

while what he's saying rings true, there's a chord slightly off-key, something askew that you can't place. is he closer than before?

you ignore it, trying on a smile. "well, feeling's mutual."

you take another sip from the bottle, the cool rim settling on your lips, sparks igniting on your tongue, the same routine replaying. you don't even think before adding gleefully, "and he's like, a jazillion times more sane than my last boyfriend, so i'm happy."

"are you?" sukuna asks, serious.

it was like flipping a switch. he was laughing, now he's earnest, and you were just entirely confused, his meaning lost on you, like you're the last in line in a game of chinese whispers. he caught you off guard with that one. and he knows it, too, carmine eyes feasting on your discomfort.

your smile falters slightly before you nod. "yeah."

"okay." he just says.

now you were really starting to get pissed off with him. whatever he's doing, it's stupid. he might as well have you cornered, except you've done nothing wrong, and yet he's prancing around you with a tone of prolific doubt. as if he knows something about you that you yourself don't.

"what?" you demand, equally serious now, smile wiped clean off. the air turns thick.

sukuna shrugs his shoulders again and you swear you have to fight off a sneer. "nothing."

is he casting doubt on your love for yuji? is that what this is? is he trying to tell you you're not good enough for him? that even though you trudged half a mile in those huge stupid heels just because he said they looked hot on you—carrying his dead weight, might i add, as he was screeching a song you'd never heard in your ear—that all of that was just for laughs, and there were no real feelings behind those actions? is that seriously what he's getting at?

sukuna wants to laugh so bad. your face is all screwed up, cheeks puffed out and burning a deep red. oh, how it fuels him. your stubbornness, that endearing naivety that clings to you like all your modest perfumes, the one that lingers in yuji's room, occasionally in his clothes, infecting every dark corner of his mind—and now you know how it feels to be tortured by him.

"you want some water?" the man asks casually. your mind is on fire, your thoughts more blaring than you would probably think. it's written all over you.

his question makes your shoulders drop, feeling stupid all over again. what are you getting so worked up for? you're secure in your feelings for yuji. as his brother, sukuna has every right to feel concern for him. there really is no need for you to be acting like this.

he's playing you like a damn flute.

"yes, please." you answer a lot more softly, pulling your hair around to one side. you'd been bratty without cause, assumptive, again. you really need to stop mischaracterizing him. after all, he's no monster. "i think all the drinks are finally getting to my head a little."

he starts filling up a glass, grinning at you over his shoulder, mischief playing in his slanted-eyes. "oh, don't tell me you were expecting anything bottled. tap's the best y're gonna get from us. hope you can handle it."

a smile works onto your lips as you finally start to loosen up again, legs swinging gently off the side of the counter. playing along, you wince. "oh yeah, well, i usually only drink expensive, you know, mineral-rich—"

"yeah."

he's suddenly between your legs, his mouth devouring your own, swallowing the terrified noise that begs to escape. for a moment, you're frozen in shock, eyes widening as you palms meet his chest in a forceful attempt at creating space.

sukuna juts back, forced away from you. his eyes crack open but are still like slits, dark, crawling with lust you hadn't previously noticed—no, acknowledged, because the choice has always been there.

he relishes in the terror that brims in your eyes at his visceral kiss. it feels natural, but not in the tender, motherly sense. like predator devouring prey. the natural order of life.

his hands are hot, gripping onto your thighs, digging into the tights he could easily rip to shreds, giving him full access to your warm cunt, to ruin you.

and yet he doesn't.

he waits for your eyes to droop, for you to lunge at him, accepting this twisted spiral of events, indulging his darkness. teeth clicking, tongues meeting messily in a sloppy kiss, drool gathering between you both as you crash together all at once, a train wreck of carnality. sukuna's hands are all over you, groping, slashing at the crotch of your tights. you gasp into his mouth as cold air meets the sobbing wetness of your cunt, followed by a slap to it.

"f-fuck! hey, who said you could—hmff!" you yelp as his hand clamps over your mouth suddenly, his scarlet eyes narrowing.

"brat, watch ya fuckin' mouth." sukuna warns as you grapple with him. his tattoos look especially menacing then, chiseling his features. "he's drunk. not deaf."

you nod, trying to tell him you understand. he releases your lips in an instant only to seize them again in his so forcefully.

yuji would never—could never take you like this, and you fucking know it. you know it with every gnaw, every squash of your tits that leaves you whining like a bitch in heat, every bite against your neck where you can feel the outline of his brother's teeth and a short gush of crimson.

rationality is lost on you as you mindlessly rut against him, your hands running up and down his back until you start tugging on his pants, eager to rid him of them.

meanwhile, sukuna's making a meal out of you—you make up half of his size, giving him complete control to do as ever he pleases.

every whine is met with a grunt. his cock must have been freed at some point as you feel his greedy hands lift you against him, your chests meeting, the sharp cold of the counter leaving your ass and feeling his palms spread you apart instead.

nothing could prepare you for the suddenness of which he fills you—you scream, half openly, half having shoved your face into his shoulder—aware his brother, your lover, is passed out over the toilet in the other room.

"shh, shh—fuckin' shit!" sukuna groans, features curling in erotic bliss.

he gluts you in ways yuji never has, the ways he'll never dare—with such cruel, carnal demand, to the brim, unkind, violent, and so, so fucking good.

as he breaches your womb, you claw his back raw through his shirt. a sob rips through you. sukuna does his best to keep you quiet. "shh... fuck. yer so fuckin' tight, girl. relax."

"t-tryin'... 'm so full..." you whine, eyes misting over with tears. it feels too good, you think...

"i know—" sukuna chokes, barely lifting you up on his cock, feeling your walls spasm around him. "fuck, what ya cryin' for?"

he feels too good.

"d-don't move yet, i'll cum," you gasp, and he hasn't even tried—sukuna's expression blanches.

"already?" he bursts out laughing in his brutish way, the side that yuji lacked entirely as the nicest person you've ever known; fuck. the humiliation makes your cunt squeeze again.

he lifts you up, your knees draped over his thick arms, foreheads meeting. your breaths intertwine, hot and treacherous, caressing each other's faces.

"ya know, i've fuckin' heard you, all those times."

"wh-what?" you stammer cluelessly, only half there, clinging to sukuna as he dangles you on his cock, your eyes crossing when he starts to bounce you on him.

"said i fuckin' heard you, you 'n yuji—'n shit, ya never got this loud, huh?" he smirks wickedly, feeling your body collapse hopelessly against him. he fucks you up and down on him, swallowing up your pathetic moans and whines like they were the last noise he'd ever hear. "been wanting to take ya like this, stretch yer dumb little cunt on me, fuckk—ya got no fuckin' idea, princess."

rocking up and down, you wail, head bobbing. sukuna can just see your little maw dangling open—it takes everything in him not to jam his fucking fingers in your throat until you drool and splutter around him.

"y—you wanted—this?" you struggle, feeling too good to make sense of anything, to think straight, to do anything other than take every rough kiss to your cervix, feeling your insides bruise and swell with lucid excitements.

"lemme guess, the brat cums too soon—never quite gets ya there, hm?" sukuna guesses correctly, making you whine and nod and babble.

"h-how did y—ah, fuck—!" he snapped his hips, picking up the speed as you wept on him. you'd never been fucked like this in your life, and your world was getting flipped on its head. when did your dress come down? you weren't sure—but now your tits were bouncing and sukuna wasn't gonna pass up the opportunity to tear into them.

"cuz, 's just obvious," sukuna rasps, teeth clamping down on your raised nipple, "can tell this sloppy pussy ain't gettin' treated right. not when she's—shit—creamin' all over me jus' from stickin' it in."

"'k—kuna, don't—ahh! fuck!"

"that's it girl, shit, c'mon," sukuna keeps picking you back up only to drop all your weight on his fat cock, his balls slapping against your ass, the slick you're gushing causing them to stick together.

your head is empty, devoid of anything except the chaos, the suddenness of it all, the shock, he's fucking you. your boyfriend's older brother is fucking you, and you've never felt so goddamn good.

there's this sudden wave. a wetness. an explosive feeling that crashes over you in one swift, predatory pounce. like when a deer gets suddenly ripped apart. your head straight up drops on sukuna's shoulder, and you're sobbing loudly, babbling words that can't be defined.

then all of a sudden, sukuna outright cackles; the sound bleeds into your ringing ears, head picking up off of his shoulder.

"no fuckin' way!" he roars with laughter. you wanna shush him, but you can't move—your nerve ends are all bursting to life, like fruitful grapes popping between two fingers. it's happening again, whatever that feeling is, whelming you; this time you his fingers rub back and forth harshly across your clit, but wait—

"dumb lil pussy's squirtin' already, hahh, shit—fuckin' christ, girl—" he's enamored, watching you cum in adorable little spurts, soaking his clothes, your tights, and the kitchen floor, covering everything in your stupid juices.

"you wanted this, goddamn—look at you."

your eyes are rolled back as he kisses you again, fingers tearing into your scalp, the lewd sound of your lips smacking together filling the air.

never in your fucking life. you'd never came like that, so violently, so carelessly, not without really, really trying. all sukuna had to do was pump you up and down on his cock, say a few words and you were spraying like a tap. how fucking pathetic.

and then he does it again. drags another one out of you, laughing.

you barely catch his next words.

"'m gonna fuckin' cum in ya."

"n—no—" you stumble out, barely coming to at the words, but their enough to fill you with at least some urgency. your ass is bruised at the back from being repeatedly slammed against the counter, the wind knocked out of you entirely. "d-don't, wait, you can't—"

"why the fuck not, hah?" sukuna rumbles. "don't tell me it's cuz'a—"

"—yuji," you sob.

it hits you. it hits you then, hard, at the worst time. a gut-punch, one that makes you heave. in less than half a second, a guilt strong enough to set your skin alight cultivates and wrecks each single sense. his cologne invades your nostrils, an imaginary sensation, forced to breathe its natural, tender nature as opposed to sukuna's harsh and crude and brooding one, the one you're drowning in. the one sticking to your skin.

your hand—finally letting go of sukuna's shoulder, where you were keeping yourself stable—slaps over your mouth, tears springing into your eyes.

"f—fuck, fuck, fuck!" sukuna chants, eyes scrunching as he gets lost in the pleasure. he's pounding you, knocking your eyes back still, not slowing his pace for anything. your leg flails once, but how can you fight when he's holding you up like this?

"'s—'kuna," you choke out brokenly, slapping his chest with whatever strength you can muster. your lip quivers, heart aching in your chest as you plead tearfully, "don't."

he'd never been considerate. he'd never 'made love'. not even now. he fucked. he lied, he slipped off condoms, he 'forgot' to pull out, all so many times before. it was clockwork to him. he could've easily done it again. lied. been selfish. blurred the lines. cheated consent.

put a baby in his little brother's whore girlfriend.

and yet sukuna weirdly found himself pulling out of you last second, one hand holding you up while the other jerked his cock until thick ropes of cum splattered up your dress with a strained grunt. his orgasm spoils at it hits, a rough ecstasy that's tattered along the edges and ultimately, ultimately unsatisfying. it barely scratches the surface. the heat of it hasn't even started leaving his body before he wants more, regrets not filling you up, every cell inside him clawing for it, starved and fucking addicted.

sukuna almost, almost crushes you against the island, dropping you on the counter again where your drenched cunt feels like it's been electrocuted when met with the cold so suddenly. you gasp, arching into him, searching for any kind of warmth.

but he rips away from you, turning his back. his touch is gone as soon as it came. any desire flatlines, ringing loudly, blaring in your sensitive ears. alarm bells.

what is this?

both your chests are heaving. there's no afterglow. it's messy, dirty, frantic. cheap. depraved.

and it seems like you aren't the only one.

"s-sukuna, i—"

CLICK.

lips snapping shut, you sit right up, head whipping around in the most deafeningly guilty sense ever. heart in your throat, your expression echoes one of pure horror, one you expect will reflect your boyfriend's when he realizes what's going on here.

yuji stumbles out of the bathroom, his mop of pink hair tousled and eyelids low. he hangs by the doorframe for several seconds, his head dropped, not even looking up. it takes only a few steps. they're slow, clumsy, lead him to the bedroom door. he doesn't notice. he doesn't notice.

his older brother and his girlfriend are feet away, covered in squirt and sperm and other dirty secrets. shame. guilt. some more than others.

and he just blunders into the bedroom, a loud 'thump', telling you that he made it to bed.

all you do is stare. your jaw stays slack.

you hear a zipper and, frazzled, quickly flit your head at sukuna. he's fixing his clothes, not paying you any mind.

you stare at his back, despairing.

"wh—you're just gonna...?" you stammer incredulously, trying to do the same but there's no fixing the gaping hole in your tights that reaches down to your mid thighs.

away from his gaze, him cum settles against the fabric of your torn up dress, pooling slowly in its place.

his cock, hardly soft, twitches again, urging his need. he ends up frozen for a moment, simply staring, before he numbly moves forward.

he leaves, leaving you sat on the counter as he storms out into the night, slamming the front door behind him.

you're alone there, stunned, cum up your dress that is almost but not quite your boyfriend's, the floor below you soaked, and a heartbeat in every part of your body.

trembling, you push yourself off of the counter.

vaguely aware of the layout of the house, you scramble to find some wipes and clean up the mess on the floor. after that, it takes at least 10 minutes to get the semen out of your dress, but even then, you feel filthy.

you sniffle over the sink, scrubbing soapy suds into your tainted skin. wanting to throw up.

what the fuck had you done?

you'd cheated. that's it. you cheated on the sweetest angel, your angel, yuji. the one entirely too gentle and trusting for this world. you betrayed him. a sob rips through you, shattering your core.

stupid, stupid, stupid.

as you sneak back into bed, fingers still shaking as they turn the handle to yuji's room, you don't even have the energy to change your clothes. you simply crawl into bed, too crushed to face him, not garnering the strength, knowing what you'd done. a tear slips down your cheek.

because you can't even regret it.

and before you know it, yuji's draping himself over you, his arms, pulling you against the haven of his chest, sighing against your neck.

"you made it..." he mumbles.

oh, how you want to sob when he says such a thing. "yeah," you nod, trying to suppress the break in your voice, "yeah, i'm here."

yuji grunts happily, snuggling you closer. "mmh, good."

you don't think you will ever forgive yourself.

"i love you." yuji says, blind to the truth.

but you swear it's not one-sided. "i love you," you admit, beginning to cry softly in his arms, wondering if it will be the last time you ever get the liberty of doing so again.

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