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“Is that all you’ve got?” Sukuna asks, his foot pressing onto Yuuji’s back. “Disappointing. I was expecting more after all your training. Hey, are you alive?”
Yuuji can’t reply, can’t even breathe without feeling pain. He can’t tell if the wet stickiness soaking his clothes is his blood or water pooling in their domain. His vision swims in and out of focus. When he tries to sit up, struggling against Sukuna’s weight, his body refuses to move. Everything hurts.
Sukuna shifts to crouch beside him, his grin animalistic. “Did I break you, Yuuji? Don’t die on me, brat. You have a promise to fulfil.”
“S-shut up,” Yuuji manages, feeling a sickly chill for whatever Sukuna has planned. He wishes he could wake up but here, Sukuna has so much more control.
Sukuna hums in satisfaction, grabs the back of his hoodie and stands. Every movement is agony but he doesn’t even have the energy to scream as Sukuna drags him to the front of the throne and tosses him onto the ground.
He stares into the never ending bone ceiling above, head spinning; almost doesn’t register the hands pushing his thighs apart and peeling his tattered jeans off him. “What are you d-doing?” he croaks, gaze darting to Sukuna, his heart is suddenly jackrabbiting in his throat.
“What does it look like?” Sukuna says. “You lost the bet. I’m collecting.”
“Fuck, no! I didn’t agree to this,” Yuuji tries to kick him but Sukuna’s grip is like iron, nails digging painfully into flesh as he drags Yuuji closer.
“Healing already? Good to know. I want you to be functional for the next part.” Sukuna purrs, voice low. He rocks forward, startling the breath out of Yuuji. “You’re going to be begging me by the end of it.”
Yuuji’s eyes widen, fear flooding through his system as he valiantly tries to twist away. His limbs still won’t cooperate and he ends up flailing and squirming, frustration bit back behind gritted teeth. He’d be damned if he let Sukuna see how terrified he is, almost missing Sukuna’s next words for the roaring of blood in his ears.
“Calm down, kid. You’re going to give yourself a heart attack before the fun even starts,” Sukuna says, giving Yuuji’s dick a squeeze that makes his breath stutter. “I’ll make this good for you.” he can hear the grin in Sukuna’s voice. “If you behave.”
“Are you crazy? I get you’re pent up and all - ”
“Damn right I am. Now just relax and enjoy yourself,” Sukuna splays his fingers just under Yuuji’s hoodie, fingers skating over his abs, his other hand squeezing Yuuji’s dick from base to tip, Yuuji grabs madly at his hands, but Sukuna is too strong - absolutely immovable. He gives up grappling, tries to get his elbows under him to push himself up but Sukuna is faster. His hand shoots up and grabs Yuuji by the jaw, slamming him back down hard enough that light flashes through his vision.
Sukuna leans heavily over him, hand tightening. “Don’t make me repeat myself.” Yuuji can feel the hard length of him pressing against his ass, body furnace-warm even through the layers of his robes. “Now, are you going to be a good boy?” Yuuji’s reply is a garbled angry mess. His own hands are wrapped around Sukuna’s wrist, trying and failing to dislodge him. He can’t fucking breathe -
Sukuna grins, releasing him.
“F-fuck you, Get off me - nngh.” He gags around two of Sukuna’s fingers, shoved so deep, they scrape the back of his throat.
“Don’t bite now,” Sukuna leers even before Yuuji can think about it. His grip on Yuuji’s cock is so brutally painful, tears spring into Yuuji’s eyes. The message is clear: Bite and I’ll rip your dick off. “SInce you like swallowing my fingers so much, I thought I’d give you a treat.”
Saliva is pooling in his mouth but he can’t swallow properly around Sukuna’s fingers. He’s drooling down his chin and from the corners of his mouth. Sukuna’s black nailed fingers are rubbing along his tongue, on his palate, against his teeth, thrusting back and forth with the same rhythm he’s jerking Yuuji’s cock, making sure Yuuji chokes each time.
“Look at you,” Sukuna says, thumb digging mercilessly into the slit of Yuuji’s cock while shoving a third finger into his mouth. Unable to stop himself, Yuuji groans around the fingers, his own nails carving crescents into Sukuna’s arm. He hates this, he absolutely hates this but his body doesn’t seem to be on the same page at all. He’s dribbling pre-cum all over Sukuna’s hand, cock throbbing for release. “Better get them nice and wet if you don’t want it to hurt.”
Yuuji’s gut twists horribly. If Sukuna wasn’t still working him, his erection would have wilted. Fuck Sukuna, seriously. He doesn’t care if he ends up dickless. It’s a dream. It’s not like Sukuna will actually mutilate his body in the real world, not when he has a share of the real estate. He bites down, hard. Blood gushes into his mouth, coppery and salty.
Above him, Sukuna laughs, knuckles running along Yuuji’s cock once, mockingly tender, before his hand snaps to Yuuji’s throat instead. He squeezes and fuck, between the asphyxiation, fingers and the taste of blood, Yuuji can’t draw in a single breath, his body seizing as he chokes, jaw loosening enough that Sukuna can pull his bloody fingers out but the bastard doesn’t let up, still squeezing tight, so tight, pinning Yuuji down as he gasps and struggles, kicking weakly; Sukuna’s smirking face blurring as his vision dims.
“Fuck me, kid, you like this, don’t you? You’re leaking like crazy.”” Sukuna murmurs, tongue darting out to lick the blood from the corner of Yuuji’s mouth. He sits back on his heels, relaxes his grip just long enough for Yuuji to sob one measly lungful of air before it’s choked off again. He doesn’t know why his body is reacting like this. It scares him. He’s scared.
“Now then, let’s see,” Sukuna drawls. The touch against his hole is feather light and teasing. Yuuji’s whole body clenches. He can’t see what Sukuna is doing, only the rise and fall of his own heaving chest.
Sukuna circles his hole with a warm, spit-covered bloodied finger. He pushes in and releases his grip on Yuuji at the same time. The breath he so desperately needs stutters into a gasp. “Mm. Tight. You a virgin, Yuuji? Relax. Since it’s your first time, I’ll be gentle.”
Does Sukuna expect him to answer? He’s so dizzy he can barely talk, his throat hurting every time he pants. The intrusion is strange but not painful. Yuuji can take it. He just needs to gather his wits and his strength and then - then -
Sukuna pushes his water and blood soaked hoodie up his chest. Yuuji has a dazed moment to stare at Sukuna’s lowered head and then hot wet heat closes over his nipple. Yuuji throws a hand over his mouth on reflex, dampening the keening noise behind clenched teeth. He squeezes his eyes shut but it’s so much worse when he can’t see. It’s sloppy and painful and so shockingly good. Sukuna’s teeth working into his flesh with wet sucking sounds, his lips and tongue leaving wet trails of saliva.
Yuuji squirms, tries to push Sukuna away. “S-stop. Wh-what are y- uhn, uhn, ah - ” Sukuna bites pulling the sensitive nub with his teeth until it’s puffy and swollen.
“Thought you might like that,” Sukuna mouths against his chest, between laving the soreness with his tongue. “What d’ya know? Turns out you’re a sucker for pain.” He sinks his teeth into Yuuji’s other nipple before Yuuji can respond with more than a whine, sucks on it until it’s stings and Yuuji is a writhing mess under him, unsure if he’s trying to escape or wanting more. He’s so fucking hard it hurts, cock curving onto his stomach and dribbling cum each time he brushes against Sukuna’s robes. He’s distracted enough that the second finger Sukuna slips into him almost doesn’t register until Sukuna starts pressing and petting, searching, and presses -
Yuuji throws his head back, mouth falling open in a moan as he comes so hard his vision whites out. Sukuna is laughing against the hollow of this throat. “Virginal, indeed. Such a slut, Yuuji. You can thank me later for the sexual awakening.”
Yuuji’s face is burning as he rubs the heels of his palms into his eyes, blocking out Sukuna. “No. Please. I don’t - I can’t-” he’s sobbing. His mind is a mess, thoughts jumbled, heartbeat pulsing in his cock, still spurting white streams of cum. Sukuna pulls his fingers out and licks them.
‘We’re just getting started,” he says, voice low and filthy, full of promise as he strips the top of robes off. He hauls Yuuji’s legs over his shoulder, petting his calf in a mockery of affection and bends down.
“Wha -” Yuuji starts, eyes huge.
Sukuna licks over his entrance once and fucks his tongue right in. Yuuji’s spine turns liquid, back arching as he lets out a strangled cry, His cock is already filling once more, arousal burning through his veins in a heady rush. Sukuna switches between sucking and licking, occasionally nipping before thrusting his tongue back in. Yuuji’s thighs are quivering. He didn’t know it was possible to be this turned on, this desperate, squirming and trashing with need for more - and hating every second his body betrays him. He didn’t know he was capable of making such noises - hoarse stuttered moans and whines that sounded like he’s dying.
He wants to get away.
He wants Sukuna to never stop.
And Sukuna doesn’t. He keeps at it even after Yuuji comes for the second time, bliss out and empty of thought. He’s almost painfully stimulated, his nipples throb, his cock throbs and his hole is fluttering around Sukuna’s tongue, tingling and slightly sore from the dozen nips and grazes of Sukuna’s teeth,
Sukuna finally pulls away, mouth red and smeared with saliva and Yuuji's cum. He licks his lips, eyes alight, and presses his thumb into Yuuji, watches with malevolent glee as it’s sucked in with almost no resistance. “Perfect. Good boy.” Yuuji jerks - it’s all he can manage - and whines brokenly, when Sukuna kisses his inner thigh then sucks hard enough to bruise. He lowers Yuuji’s legs and spreads his ass cheeks apart. The black markings on his body accentuates the hard lines of his muscles, grip sure and strong.
Technically Yuuji is staring at himself but it never feels that way. This is Ryoumen Sukuna, even if he wears Yuuji’s face, there’s no mistaking the entity inside. And he’s a hungry, lustful, cruel bastard and Yuuji hates him.
“There you are,” Sukuna breathes, mouth curling into a smile. “I like the look in your eyes. Don’t be boring, Yuuji. I hate being bored.”
“Go on, fuck me,” Yuuji challenges, voice hoarse.
Sukuna pushes his robes aside. Yuuji doesn’t have much basis for comparison but Sukuna is big - thick and long, curving against his belly, the head shiny and red with pre-cum. He swallows reflexively, mouth dry, steeling his nerves. “Don’t get cocky, brat,” Sukuna says, nudging the hot length of him into the crack of Yuuji’s ass, skating over his hole but not pressing in, just rubbing back and forth from his clenching hole to his balls. He’s keeping Yuuji on the edge of fear and anticipation, adrenaline making his heart rate spike again. Fight or flight.
His breathing is growing erratic. “You’re boring me,” Yuuji lies, because he wants to have some measure of control here. He wants this to be over. He wants - he wants -
What the fuck is wrong with him?
Sukuna cages him in, flicks up his hoodie and grinds the heel of one palm against his sore nipple. It burns, the pain-pleasure making his cock twitch. Yuuji’s breath hitches.
“Thought so,” Sukuna says, withdrawing with a smirk. He grabs Yuuji’s hips and thrust in without further warning. Yuuji’s clenches against the pressure, fighting the intrusion despite Sukuna loosening him up considerably earlier. The stretch feels enormous, painful. He shudders and pants until the tip of Sukuna’s cock sinks into him forcing a long moan out of his chest. Sukuna is relentless, pushing into him without stopping. Yuuji doesn’t beg, doesn’t plead for him to. He takes it. The stretch and the burn and the feeling of being split open.
Sukuna is watching him, judging him and when Yuuji takes him to the hilt, back arched and tears leaking down the side of his face through his gasps, Sukuna says softly, “Good boy.”
Yuuji’s cock is hard again.
He’s fucked up, so fucked up.
He feels… light headed, full. So full. He’s trembling from head to toe with the sensation of Sukuna in him, hot and massive, filling him so much that he’ll burst. Sukuna drags his cock almost all the way out and slams back. Yuuji can feel the force of his thrust as if it’s hitting the back of his throat. “Oh, fuck,” he groans, scrabbling on the ground for purchase, something, anything to tether him.
“That’s right, brat, You were built for this. Taking cock like a bitch in heat,” Sukuna taunts. But there’s no heat behind his words and Yuuji doesn’t really care anyway, not with Sukuna fucking into him just like this, fast and hard and uncaring about his comfort. He’d think he wouldn’t be able to stomach it otherwise. Sukuna surges forward, hands gripping beneath Yuuji’s thighs to spread him even wider and the change in the angle has Yuuji eyes startle wide, mouth falling open in another long helpless moan.
He’s close to coming again. There’s an urgency building in his gut, balls tightening, cock pulsing,
Sukuna catches his wrists and pins them to the ground beside his head, Yuuji makes a sound close to pleading before he catches himself. “I’m going to teach you to come from just being fucked in the ass,” Sukuna growls, breath hot in his ear and Yuuji whimpers. “I’m going to fuck you until you cream yourself.” He sets a brutal pace that punches all the air out from Yuuji with each thrust, hands around Yuuji wrists like burning manacles, chaining him down, chaining them together.
They’re too close like this, too intimate. Yuuji has to look away, turning his head to the side, baring his throat to the mercy of Sukuna’s teeth. He knows what he’s offering. He doesn’t know why. And above him, Sukuna’s grin is maniacal and wild, canines sharp as he sinks his teeth into Yuuuji’s neck, just above his pulse point and Yuuji cries out, taut and clenching, shuddering through his orgasm as he spills all over his stomach and Sukuna’s.
-----
Yuuji shivers awake, noticing two things; he’s naked and he’s not in bed.
He’s in Sukuna’s lap and - Yuuji bites back a mewl - Sukuna’s cock is still in him. “Welcome back, brat. You came so hard, you passed out,” Sukuna says, shifting so Yuuji’s back is pressed against the long hard muscular lines of his front.
Yuuji wobbles. He can barely lift his head from Sukuna’s shoulder. “I thought….”
“You thought you’d wake up? Too bad, kid. Time moves differently here.” He traces his fingers idly along Yuuji’s ribs up to his nipple and twists it sharply. Yuuji sits up straighter, squirming. He can feel Sukuna against his prostate and it fills him with a confusing mixture of dread and desire. Sukuna kisses his shoulder. “We’re going to have so much fun.”