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madaqueue · 1 month

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What the Books Don't Teach You

pairing: ryomen sukuna x reader

themes/content: dark content. dubcon. language, smut. name calling (slut, whore), hair pulling, choking, orgasm denial, fingering, sex. 18+, MDNI

word count: 2.5k

a/n: i'm so sorry if this is the first thing of mine you're reading or if you followed me for cute content AH it's dark and intense but i am such a sukuna apologist :'/ forgive me (also i know this isn't perfectly canon with the name stuff but shh)

The library is dim, illuminated only by the flickering candles that surround your workspace. Books upon books, pages of notebooks sprawled around you, trying to uncover anything you can about the curse that has plagued your best friend Yuji.

It’s been months since Sukuna first appeared. At first he was easy to contain, surely owed to Yuji’s strong willpower, his need for nonmaleficence. But as he consumed more he grew increasingly powerful, a dark presence that constantly hid around the corners of his mind. Yuji could sense it, too - there would be moments, barely just flashes at first, where it’s like he wasn’t there. You’d be talking to him and his eyes would glaze over, the ever-present grin on his face dropping slightly. “Sorry,” he’d mutter sheepishly as returned to himself, “what were you saying?”

Inside his mind, you knew what was happening: Yuji was talking to him. The “King of Curses,” a title he demanded to be called, one that you refused to use whenever you were forced to acknowledge his presence. You’ve seen him kill over the name when it was not honored, yet you would rather die at his hand than utter an ounce of respect to him.

As time went on, Sukuna appeared more and more often, a fact that every Jujutsu sorcerer desperately tried to ignore. When he did appear, the man was cruel, selfish, and sadistic. He taunted those he knew to be weaker than himself and purposely placed himself in harm’s way to prove his own strength. He left a path of destruction and desecration in his wake, forcing Yuji to clean up the pieces.

Sukuna had ruined Yuji’s life, and you couldn’t stand by and let your friend suffer under the weight of the curse for any longer. You began sneaking out of your room every night to the library, trying to collect any information on how to rid him from existence. It didn’t matter if he had to be exorcised or killed, so long as he relinquished control of Yuji.

Unfortunately, information was sparse. In the weeks you’ve been searching you haven't even been able to find the source of Sukuna’s cursed energy, let alone how to eliminate it. As your eyes skim the pages of text in front of you, something catches your eye:

‘Ryomen Sukuna holds a true form unlike any other. He is a demon, with four arms, two faces, and an additional mouth on his torso. This grants him inhuman strength and senses.’

Okay, you think, now we’re getting somewhere. Learning his appearance can give you insight into his strengths and, hopefully, his weaknesses.

As you begin copying the notes onto the paper next to you, the candlelight flickers.

A low laugh echoes through the room. “What are you doing in here all by yourself, little sorcerer?” The deep voice makes your blood run cold. As you start to turn towards the source of the sound in the doorway, a tattooed hand grabs your cheeks and holds your head in place. Another hand appears on your waist, digging into your skin with sharp black nails.

Shit.

Sukuna’s presence suddenly becomes overwhelming, his body pressing against your back, heat radiating off of his bare chest. You still can’t see him, but his cursed energy is unmistakable.

Your mind races as you feel panic setting in. How did he find you in here? How did you miss him entering the room? How did he take over Yuji’s body this time?

Another laugh erupts from his lips. “Aw, are you reading about me, little one? How adorable,” his voice dripping with fake sweetness.

“Su-” you start before he tightens his grip on your face.

“I didn’t say you could speak, now did I?” he rumbles. “You really should learn some manners. Besides, I know you’re aware that I don’t much care for that name.” A chill shoots up your body as you try to steady your breathing. His hold on you never wavers as he shifts so his mouth is next to your ear. “But lucky for you, I’m feeling quite forgiving tonight,” he whispers, breath hot on your skin.

Your face flushes at his words as your heart races in your chest. At first you think it’s just fear coursing through your body, until you notice a dull ache between your legs.

No. No. No. This is not happening.

His deep voice pulls you out of your spiraling thoughts as he places his head on your shoulder, looking down at the open books in front of you. “Ah, I see you were just starting to learn about my true form. I was glorious, you know. This fucking brat is nothing compared to what I once was,” he spits, mentally gesturing at Yuji’s body. “Fortunately, I was able to take one piece of my old body with me.” Before you can ask, you feel a tongue suddenly slide against your lips.

The feeling makes you jump in your seat, Sukuna’s hold tightening on you. Another laugh booms through the room as your eyes glance down to see a mouth formed on the palm that grips your face. “Don’t pretend you don’t like it, woman. I’ve seen the way you stare at the brat, just think of me like him, but better,” he smirks.

He was right - you had caught Sukuna’s eyes staring at you whenever you stole glances at Yuji out of the corner of your eye, but it was nothing serious. The poor boy already had enough going on with this curse, you couldn’t bring yourself to add to his stress by confessing how you feel.

This fucking curse.

“For what it’s worth,” he continues, “I have taken quite an interest in you myself. Don’t think I don’t notice when you purposely drop something just to bend over, or when you wear those tight shreds of cloth you could barely call a uniform. You fucking tease,” he growls.

The space between your legs throbs at the low vibration of his voice against you. What is happening? Is he doing this to you?

As if he hears your thoughts, he speaks again. “I know you’ve thought about it too, there’s no need to be so proud. Before I was stuck in this brat’s body I had whores like you lining up for me every day, not because I made them, but because they wanted me.” He pauses, using the silence to lick up your neck and bite at your ear. “And I have a feeling you want me, too.”

Fuck. His words have your knees weak and pussy throbbing. You’re grateful to be sitting down, otherwise you know you’d be visibly shaking, no longer from fear.

Suddenly the hand on your waist loosens, but instead of releasing you, he drags it down between your legs. His nails scratch softly against the skin of your thigh, bare beneath your skirt. His fingers reach your clothed cunt, and from his soft chuckle you can tell you have soaked through your panties.

“I knew it,” he mutters, tracing up your covered folds. The feeling forces a soft moan out of your mouth and you feel Sukuna’s lips curl into a grin against your neck. “Say it, little sorcerer. Say you want me.”

You gather every ounce of restraint left in your body to answer. “N-no,” your voice waivers.

Your response seems to amuse him as he practically giggles into your ear. The hand that previously held your face drops down to your neck as he squeezes your airway closed. “And here I thought Jujutsu sorcerers were supposed to be some noble, honest breed. But I guess some of them can be lying whores, huh?”

With that, he grabs you and throws you against the desk, your chest hitting the dark wood with a hollow thud. Your hands land under you as you try to brace yourself against the sudden impact and Sukuna takes the opportunity to yank your skirt down your legs, throwing it across the room. You yelp as a hand crashes against your thigh, pulling you back towards him. He presses his hips against you, feeling the bulge growing through the black sweatpants Yuji must have been wearing to bed. “See, my cock knows it wants you. Even I can be honest, so what’s stopping you?” he growls. He grinds himself slowly against you, the pressure against your needy cunt driving you insane. “I know this pussy wants me, just admit it,” he sneers.

“I-” you try to start again before Sukuna shoves the side of your head down against the desk, your cheek hot against the cold wood.

“The next words out of your mouth better be the truth, or I won’t hesitate to kill you,” he rasps into your ear.

Think, think, think. How can you get out of this? What can you say to appease the man - no, the curse - that’s currently pinning you down?

As you’re trying to think of a way out of your current situation, he thrusts his hips up against you. The action, still done through two layers of cloth, forces another moan out of you.

Fuck, that feels good.

“I…I want you,” you whisper, the words leaving your lips before you can realize what you’ve said.

“Louder,” he commands.

“I want you,” you whine. “Please, Sukuna, please.”

Boisterous laughter fills the empty room again. Leaning back over you, he whispers into your ear. “Was that so hard?”

He steps back behind you, suddenly ripping your now-drenched panties into shreds, making you gasp as the cold air hits your heat. Finally free from the hold he had on your head, you turn your body slightly to look at him for the first time. In the candlelight, he looks haunting - tattoos outline the contours of his body, covering his face, arms, and chest, the flickering light casting shadows across the hollows of his scarlet eyes that are currently focused between your legs.

Sensing your gaze on him, he smirks. “Admire it while you can,” he says while lowering the waistband of his sweatpants to release his fully erect cock, a drip of precum leaking from the tip reflecting in the dim light. “Liars don’t get to watch while I fuck you.”

His arm shoots up to the back of your neck, pushing your face back down against the desk. The other goes to your pussy as he shoves two fingers roughly inside of you. Before you can even process the new sensation, you feel a tongue form on his hand and begin lapping up your folds. “F-fuck!” you scream, pressure suddenly forming in your stomach.

“So close already?” Sukuna chuckles from behind you. “I’ve barely even touched you, you needy little thing. Must’ve been waiting for this for a while, hmm?” he purrs. Your back involuntarily arches as your legs begin to shake. Right as you feel yourself approaching the edge of an orgasm, his hand pulls away from you. “Not so fast. You still have to learn some manners, remember?”

The hand that was previously on your neck moves to grab a fistful of your hair as the other grabs your waist, pulling your ass up into the air. You hear him adjusting himself behind you and your eyes widen as you feel the tip of his cock press against your entrance.

“Now, say my name, whore,” he barks at you.

“Sukuna-” you whimper.

“No.” He yanks your hair, pulling your head off the table.

You hesitate. You know what he’s asking for, but you also know you vowed to never, ever call him that.

“Say it,” he commands, voice stern.

As you contemplate your next words, Sukuna slowly starts sliding his cock inside of you. The sensation of your walls stretching around him, a mix of pain and pleasure, makes you whimper.

Something in you needed more, and you only knew one way to get it. Fuck.

You take in a shaky breath, knowing what your brain has to do to get your body what it wants. “K-king…King of Curses.” Your voice waivers as the title leaves your mouth.

He smiles. “Good little sorcerer,” he hums. Suddenly, the hand on your hip grips you hard enough you can almost feel his nails breaking skin. He thrusts his hips forward, forcing the rest of his length inside you. Sukuna grunts as he enters you, relishing in the tight, warm grip you have around him. He pulls out of you before roughly shoving back in, tears welling in your eyes from sheer pleasure.

Pulling your hair further, he brings your body flush with his. “Now,” he growls into your ear, “let’s see if you can behave well enough to cum on my cock.”

The words alone have you dizzy, pussy clenching around him. You want to open your mouth, you want to scream, beg, do anything for him to let you finish, but something tells you to wait. He continues to pull out and thrust back in, his hips circling in rough, imprecise motions. The wet sounds of him pumping in and out of you fill the air, the noise so lewd you pray no one else happens to be walking past the library. You feel so full, his cock splitting you in half, and you still want more.

“Well?” he questions, breaking your silence. “Aren’t you going to ask?”

“You…you didn’t say I could speak,” you respond meekly, trying to hold yourself together as he continues to thrust into you. Skin on skin, the sounds of his balls slapping against you, pelvis ramming against your ass, echoes through the room.

Once again, he laughs. “What a surprise, you really did learn your manners. What a well-trained slut you are,” he hums. You feel your core tighten again at his words. “For behaving so well, I’ll let you cum.”

Upon hearing his permission, something inside of you snaps. You throw your head back, moaning, as you tilt your hips to take him even farther inside of you. His tip pushes into that sweet spot, bringing you closer and closer to your release.

Finally, it hits. Your eyes roll back into your head, your mouth opens as a sound, somewhere between a scream and a groan, escapes your lips. The pain, the pleasure, the everything of Sukuna’s cock surges inside of you. He never relents, never slows, as your pussy twitches around him. Your legs give out and he releases your hair, letting your body drop to the desk beneath you.

Your head spins, vision clouded as you lay on the table. The first thing you feel is Sukuna pulling out of you and you whine at the empty feeling you’re left with. He walks toward you and leans over, face to face with him for the first time, his red eyes burning into yours.

“And that, little sorcerer, is why you can’t learn everything about me from a book,” his voice low. All you can do is stare at him, eyes glazed over. “Maybe next time you’ll earn my cum, if you can remember how to behave,” he smirks.

Without another word, he tucks his still hard cock under the waistband of his sweatpants and turns to walk away, presumably back to Yuji’s room. You’re left in the dimly lit library, panting, aching.

You may not know much about Sukuna, certainly not from your reading, but you do know one thing: you need more of him.

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