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heian-era-housewife · 14 days ago

Text

This fic is part of the Monster Mash collaborative event hosted by @nanamiscocksleeve ♡

Synopsis | Things get a little monstrous when you end up swapping bodies with the very curse you were sent to destroy.

Content | mdni 18+, f!reader x CurseMonster!Sukuna, slight dubcon, body swap, sex (piv), oral (f receiving), dp, biting, mention of blood, swearing, sukuna is ooc, you *literally* fuck yourself, it gets weird.

Word Count | 2.7 k

A/N | Idea credit to the ever-creative @noodle-is-unstable . Click HERE to see the SMAU that inspired this story and be sure to check out Noodle's other works!

"Come now, you mustn't stop trying!" The monster's voice rang out into the night.

Your lungs burned with each ragged breath as you drew in the cool evening air. You'd been sparring for what felt like hours. Aloft on a Tokyo highrise rooftop, you and the beast you'd been hunting for weeks had finally come to clash.

A wayward smile curled your lips. "Don't you worry, Sukuna. I'm just getting started."

"It seems he's looking for a vessel." Yaga had informed you when the monster curse first appeared.

"A vessel?"

"Someone he can posses. Someone with strength and powers to match, to maximize his abilities. That's why we're sending you." He counceled.

"Why me?" You asked, thinking of at least a dozen more qualified sorcerers. You weren't even special grade.

"Because you are the only one Ryomen Sukuna can't control."

It's true, your ability was unique. Rather than a cursed technique, you had what could only be described as "curse resistance". While you weren't the strongest fighter, cursed energy rolled off your back like droplets of water. And while not entirely immune, you could take a hit like no other. In the odd case of bodily posession, you were a stone fortress.

In the weeks since your dispatch, you'd spent your time tracking the four-armed monster. Learning his methods, his motives, the sound of his voice- and he was well aware. He left you red herrings, had you chasing down bootless errands, and generally toyed with you like his own personal plaything. But your game of cat-and-mouse was coming to a head and there was just one thing neither of you had counted on.

Fatal attraction.

Impervious to his flame, you walked toward him through the raging inferno like something out of an action thriller. The warmth of his curse lapping at your skin as you sauntered through. The air between you thick with heat and excitement.

"You're stronger than I imagined." He praised. "I'm impressed." A rare acknowledgement from the monster of all curses.

"And you're not nearly as hideous as they claim." You teased. "Almost a pity I have to kill you." A dreadful smile curled his lips as you dodged another glancing blow. He was fast and clever, spurred on by your fighting spirit and already privy to your curse resistance, or so you believed. Somehow, he seemed to be enjoying himself, and with every volley of witty banter you were finding yourself feeling the same.

"Such an odd technique you have." He called over the roar of flame and the whiff of mislaid punches. While he realised early on the only real way to take you out would be with his own bare hands, the flames acted as a blind for his pursuit of an ambush, the close proximity of the rooftop forcing you both into a violent waltz. "There's just one thing I haven't been able to work out." He continued.

"What's that?" You panted.

"How is it you're generating these feelings of arousal?"

You stopped, stunned. Did he say "arousal?"

In your moment of distraction, he managed to land a kick, swiping your legs from beneath you and sending you tumbling to the ground. Your back hit the roof with enough force to knock the air from your lungs. And there was the face of the monster, mere inches from yours. His intricate markings stretching handsomely over his wry smile. His sharp teeth bared in a predatory sneer. Two of his hands had you pinned at the wrists, stretched back above your head. The other two bore down on your hips as he knelt above you, caging you in. You froze, certain your luck had run out. All four eyes peered down at you, the smallest glimmer of sadness in his crimson gaze, perhaps at the thought of his fun being over. But in his furrowed brow still lingered a questioning look.

"Speak." He said simply.

Surely he hadn't been serious?

"Answer me, brat!" He urged, warm breath fanning your face.

"I don't 'generate' arousal." You almost laughed. Such a ridiculous situation you were in, pinned beneath the monster you'd been sent to kill, the one you'd started falling for, as he unwittingly confessed his mutual attraction.

Slowly, he lowered his body onto yours, careful not to crush you under his towering weight. Bringing his lips to your ear, he purred his next question.

"Then how do you explain this?"

With a roll of his hips you felt it, the warmth of not one but two massive bulges pressing hungrily between your thighs. Even clothed you could feel them twitch upon contact. Your eyes widened.

"S-Sukuna!" You gasped.

"Surely it's you who's doing this." His graveled voice just barely above a whisper. "No mortal being has ever made me feel such a way." His words sent heat rushing straight to your core, and creeping wantonly up your neck. When you spoke, your voice was thick with need.

"Sukuna, I don't have a cursed technique... I have curse resis-"

"Shhh." He hushed, breathing deeply against your neck. "You will make a most worthy vessel."

"Sukuna!" You urged, squirming slightly under his hold. "Listen, would you let that go? Besides, I'm resistant to curse-"

"All I need is a bit of your blood." He cooed as if to a lover. Your head was spinning. So desperate for his touch, and yet you needed stop him. Who knew if your resistance would hold up to his sheer force of will. It was taking all that you had just to try and think clearly. But the two of you were growing ever more desperate. Your hips bucking up in sheer agony against the firmness of his cocks, still pressing into you.

He rutted against you, half whimpering half growling as he dragged his teeth deep against your pulse. The heat, the longing for his sex, and whatever energy he was using all began to overwhelm you. Darkness flooded the corners of your vision as droplets of warm blood beaded on your neck where his sharp canines were carving their mark. A distant voice yelled out in a sultry mix of pleasure and pain. Your voice.

The weight of his cocks and his name in your throat were the last things you felt before going under.

When you awoke moments later it was to the taste of metal on your tongue, the smell of something provocatively sweet, and an ache like you'd never felt between your legs. Your eyes rolled in their sockets as you forced them back open, your vision was doubled, unfocused. But as you went to rub your eyes, you nearly fell over, shocked to discover that you now had four. Staring down at your trembling hands you realized those, too, had doubled.

"What is this?" Came a voice that was hauntingly familiar. Glancing down, you looked upon the woman pinned beneath you, blood running cold as your were met with your own steely gaze. "What the hell is this?!" She spat, writhing under your hulking form.

"S-Sukuna?" You ventured, your words deep and graveled. Your own cold eyes glaring up at you, and a scent so alluring you thought you may just lose yourself.

"Brat?" There was a moment of pause. A deep seated silence while reality settled in.

"Well..." You said in a voice far different from your own.

"Fuck." Sukuna finished.

"I told you it wasn't going to work!" You moaned, following the curse as he paced along the rooftop. Your stride now twice that of his, you had to be careful not to trip over your own feet.

"I wasn't listening, I was too distracted by that technique of yours!"

"It's not a technique!" You snapped. "You're attracted to me! I can't help it if I turn you on! And, by the way, the feeling is mutual. Annoyingly so!" You said, gesturing to the obvious and very painful predicament between your legs. "How do you even walk like this?"

"Carefully." Said Sukuna with a smirk.

"Be serious!"

"As I told you I've never dealt with anything like this before. I've never experienced anything so trivial as 'attraction'." He turned to look at you. "And for what it's worth, your situation isn't much better." He leered, reaching a hand down to the growing stain between his thighs.

There was that smell again. Your own pheromones were betraying you. Even the great mouth on your stomach had started to pant in shameless desire. Flecks of drool dripped down your front.

What a mess this had become. If the other sorcerers could see you now, they'd have your head for sure. Your mission had gone belly-up, you'd almost become a vessel for the monster you'd been entrusted to extinguish, and here you were drooling and pining over the very creature you were meant to kill while trapped inside his body. At least, in some small, strange way, you weren't entirely alone.

When you looked up from your stomach's lolling tongue, you saw Sukuna, almost feeble-looking in your comparatively small frame, sitting quietly on the darkened rooftop. Human, monster. Suddenly the difference didn't seem so vast...

"Look," you began,"I'm going out on a limb here, but if I had to guess I'd imagine this will wear off after a little while. On the rare occasion I have been affected by cursed energy, it always wears off within a few hours."

"And what do you propose we do until then? You don't expect us to just sit here?"

No, you didn't. Not that either of you had much choice in the matter. You weren't about to fight your own body, nor were you inclined to return to the streets as a four-armed beast with a bounty on your head. Bringing a hand to your neck you called back the feeling of Sukuna's lips against your skin, his sultry voice within your ear.

You couldn't believe what you were about to say.

"Th-there is one thing...we could do."

The air was cold against your skin, but Sukuna was colder, trembling, naked, on the rooftop after you'd helped him remove your clothes. Yours had been easy. A pair of loose-fitting pants was all that kept your dual lengths from springing back against your stomach. The great mouth sputtered.

"Woah..." You marveled- a moment of genuine fascination amidst the bizarre scene. Each shaft was long and heavily veined, one laying atop the other in equal length and proportion. They bounced under their own impressive weight, and each bore a handsome black ring toward its base.

"You done staring?" He asked, arms wrapped around himself as he shivered where he stood.

"Sorry." You chirped. Before he could protest, you scooped him effortlessly in your arms, laying him down atop the pile of discarded clothes, shielding him under your warmth. Slowly, just as he had done before, you lowered your hips, rutting them against his own, the lower of your two cocks gliding over the slick between his thighs.

In one large hand, you gathered his wrists, holding them once again above his head. In the others, you worshipped his body- your body - in exactly the way you knew how. Two large thumbs rubbed circles on your hips, while a thick and calloused finger found your clit with pinpoint precision pulling gasps and moans from a quickly fraying Sukuna. In spite of his efforts, each little sound sent a rush of heat straight to the pit of your stomach, and that gave you an idea.

You laughed something a bit maniacle before spreading his legs and lowering yourself just enough to lay your head down on his breasts.

It was hard to control, the strange anatomy seemed to have somewhat of a mind of its own. You grunted in concentration.

"What the hell are you doing, brat?" Sukuna craned his neck to look at you. You were focused- determined. And then...

"Ohh fuuuuck!" Sukuna said for the second time that night, only this time it was downright sinful. His moans were sweet music to your ears, your cocks twitching in tandem against Sukuna's silky thigh.

With a great deal of effort, you commanded the mouth on your stomach, using its tongue to lap at those sopping folds. Once it had a taste, the rest came naturally. The great maw working itself eagerly between Sukuna's thighs, nipping and sucking as if that were its very purpose. You nuzzled into those pillowy breasts, strong hands pawing at them with surprising tenderness. Sukuna was all but gone, twisting and writhing against the steady rythm of the massive tongue, now fucking up into him as it dipped in and out of his entrance, the taste so sweet your cocks were weeping at the sensation.

Before you knew it, you were flipping him onto his knees, two hands digging bruises into his hips, the others holding him tight against your chest. In truth, you weren't certain your body could handle a cock this size, but you'd be damned if you didn't try. Leaning into his ear, you offered him a hand, your words sending a ripple of chills over his skin. "You just bite down if you need to." You said in a lustful growl before sliding your thick fingers past his lips and over his tongue.

With a careful thrust, you slid your upper cock into his squelching cunt, white stars behind your eyes as you experienced, for the first time, the delicious grip of those velvety walls. You were hooked in an instant.

Desperate cries for "more! More! MORE!" spilled out around your fingers as Sukuna arched his back, keening with every thrust. He rutted back into your frenzied sex like a dog in heat, drooling cunt raining tears of pleasure on the rooftop below. He was milking you so well you nearly missed his desperate plea.

"B-both." He choked around your fingers.

"What?" You asked breathlessly, removing your hand from his mouth.

"BOTH!" He demanded, voice cracking in his need.

Obediently, you reeled your hips back, aligning yourself with each hole, but before you could plunge yourself deeply back inside, Sukuna reached a hand back, adjusting your cocks so they were both lined up with the same hole. Your chest grew tighter.

"Y-you sure?"

A stoic nod was his only reply, knuckles tightening over clenched fists before rutting back into you.

You were in heaven. Ragged groans being ripped from your chest as you railed your hips into your own throbbing pussy. Both cocks pressed together in painful ecstacy as you chased your unholy high. Fat tears rolled down Sukuna's cheeks and you did your best to wipe them away to the tune of his pleasured cries. Your own lashes were wet with sweat that poured from your wild pink hair.

Everything about this was wrong, and yet nothing had ever felt so right.

With a strangled cry, Sukuna's walls closed in on you in the same, unrelenting nature with which he fought- powerful and overwhelming. With the same biting rapture that pulled air from your lungs and stars from your eyes. Forget being a vessel. He came with such conviction you would've given him your soul, had he asked.

"Fuck!" He cried out, and with that you were a goner. His voice sending you spilling your cum in velvety ropes. Both cocks pulsing their load in violent waves that wrought your body and rattled your brain. Your vision swam as you pumped your body full of Sukuna's thick seed. And as you bit into the flesh of the tender nape before you, the world became an inky shade of black.

"Brat."

You blinked your eyes against the darkness.

"Hey! Brat!"

The monster's voice floated to you from the depths of your hazy mind. Slowly you turned to him. His naked form towering over you on shakey hands and knees, his panting breath fanning you in its musky warmth. Chest still heaving in the wake of his orgasm.

"You're stronger than I imagined." He praised. "I'm impressed."

"And you're not nearly as hideous as they claim." You teased once again. "Almost a pity I have to kill you."

"All this, and you still wish to kill me?" He gave you a dubious look.

"Come now, you mustn't stop trying." Your voice rang out into the night.

A wayward smile curled his lips. "Don't you worry, brat. I'm just getting started."

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