Chapter Text
“Just like that, see? It’s not hard…”
It’s only been a month since you began private training with Ryoumen-Sensei, though it feels like it's been a year. What started as a helpful suggestion to get in more hand-to-hand combat (since you were lacking), had turned into something that if the school ever found out, the both of you would be kicked out.
“You’ve gotten a lot better, wouldn't you agree?”
Face flushed as you squirmed on the lap of your superior, his chin resting on the crook of your neck, nails digging into your bare thighs as he nonchalantly grinded himself into you.
You couldn't remember how this even started, one minute he was suggesting a different stance, one that would take pressure off your knees, so you could move faster, the next your head was shoved into the ground of the courtyard, legs spread, cock buried into your core as he fucked you senseless, it happened so fast, you never really had a chance to ever think about it. After that day, nothing was stopping you from asking for more and he didn't seem to mind.
“Pet?”
He started calling you that too. He used to use it in a way that taunted you, dehumanized you when you couldn't do what he asked, it infuriated you to the point of screaming at him that he needed to shut the fuck up. That, however, excited him more and he continued to use it against you, creating more anger in you. He claimed it was for your own good for having such a “short temper” but it seemed more like he just wanted to fuck with you.
“Are you really that needy today, pet?”
You snapped out of it and let out a wanton moan, his eyes flashed in lust as he grabbed your neck. Today’s training happened like it always did; you, sitting so pretty on his lap, the burn of rough fabric from his uniform on your skin, him trying to stay composed each time you squirmed with his cock buried deep inside you. Nails dug into your neck and you let out another moan and he quickly smacked a hand over your mouth.
“Ssh, little pet, you don't want anyone to hear you, right?
You nodded, wanting to be as cooperative as you could. He kissed your neck and replied with a “good girl” which made your stomach flip. He loved to praise you whenever you did as you were told and the more he did it, the more obedient you became.
You squirmed again, the hot feeling of his cock in your core made you lightheaded and you gripped the table in front of you.
“Ohh, too much already? Does my little pet want to get fucked that badly?” He laughed, amused at how your legs were constantly shaking from the pressure. He bucked his hips into you and you let out a muffled cry, trying not to be too loud.
“So cute… Look-” He pushed a hand on your abdomen and thrusted up, “-I can feel my cock bulging out… How nice…” His words felt like velvet and you squirmed, trying to free yourself from the tight sensation. He laughed again, loving how you tried so desperately to move under his strong frame.
“Just a little longer… You’re doing so well, I think this is the longest you’ve lasted.” He patted your head and you wondered how long it’s been since the two of you started. Everything was a blur and you could barely even focus on whatever he was trying to have you study in the first place. He grinded himself on you and you let out an uneasy gasp, the friction was enough to make your whole body convulse and he once again laughed at how unstable you were.
He sighed and snaked his hands around your thighs, stopping behind your knees and pulling your legs up towards your chest. You gripped the arms of the chair as he forcefully spread your legs wide.
“Such a good little pet today… That obedience deserves a nice reward, don’t you think?”
You nodded, leaning into his chest as he slowly thrust himself as deep as he could. Your whole body shivered in response to the newfound pressure building in your stomach. He held you down and let out a growl, making you moan out his name in complete ecstasy.
“What was that, my pet?”
“R-Ryoumen… S-Sen…”
He smiled and bit your neck, “Call me Sukuna today, pet.”
It was enough to make you drool all over yourself, it felt so wrong, in a sense, but you weren't one to think too much right now.
He pushed your legs closer to your chest and began frantically fucking into your core, his cock slick from your juices, making it too easy for him to fit inside. You moaned in uinsen with his thrusts, trying to stay composed but unable to catch your breath. He muttered something to you, but it just sounded like white noise as he continued to fuck you senseless.
“Sukuna?”
He clasped a hand over your mouth and paused, waiting to see if they noticed.
“Satoru… What is it?” He sighed.
“Ah, you are there, we have to head out, now”
“I thought…” He thrusted up hard and you bit down on his finger, “... We were supposed to leave tomorrow?”
“Plans change~” He laughed, leaning himself against the door.
Your heart was racing and you could barely make out anything that they were saying to each other. He continued to slowly thrust inside you, reaching a hand down to tease your clit and it made your whole body jerk forward.
“... Oh I know, the funny thing is…”
“... You’re no better, idiot…”
“You’re being such a good girl…” He whispered, continuing to tease you. “I wonder if he figured it out yet~?”
You moaned into his hand and rolled your eyes back, he reached for your hair and pulled, afraid that it was a bit too loud. He nudged for you to stand and you complied, shaky legs struggling to keep yourself up as he bent you over his desk. He softly kissed the back of your neck, continuing his conversation with your other teacher. You lifted your leg up and he eased himself inside you once again, sliding the desk forward.
“You okay? What are you doing anyway?”
He grabbed your hips and fucked you slow, feeling how you clenched any time either of them spoke.
“Mm, yeah…” He cursed under his breath and thrusted hard, “N-New cursed object…”
“Mm, be careful then and don't be late.”
“Says you.”
Gojo left, laughing at the comment, allowing you to finally breathe. Sukuna didn't waste any time digging his nails into you and fucking you dumb as you tried to grip onto the desk. He pushed you forward each time, pushing your head down, getting you closer till you couldn't breathe.
“So naughty, making all those noises… fuck… While I’m having a conversation with someone…” He held your hips tighter and smacked your ass.
“You kept clenching every time he spoke… I bet you wanna get fucked by him too, huh?”
Tears welled up in your eyes and you bit your lip, admitting that would for sure send him on a frenzy and physically you couldn't handle that.
“Hm… Judging by that expression… I’d say I’m right..” He laughed and thrusted harder, a harsh moan escaped your throat as you succumbed to your orgasm. He smacked your ass again and continued to fuck you through your release.
“M-Maybe… He should get in on our training sessions? Would you like that, pet?” He laughed again, his thrusts became more staggered and he pulled your head back.
“You little fucking slut…” You shivered as he released inside you, his grip tightened and your skin burned against his hand. He kissed your back and leaned back in his chair, admiring his work. You slid to the floor and rested your head on his knee, unable to move.
“Whaddaya say, pet?” He patted your head gently,
“Think you can endure more training?”