Chapter Text
It had been a terrible day.
The sky was overcast, the mission had gone sideways in all the worst ways.
And Sukuna had taken over Yuuji’s body.
Gojou had intercepted what would have been a killing blow to Megumi, but before he could try goading the King of Curses into fighting him, Sukuna had stopped dead in his tracks, incredulity washing the cruelty off his face.
Then he pulled the front of Yuuji’s pants and boxers away from his body and stared in indignant confusion.
“What the fuck.”
Gojou Satoru had never been a man that denied himself much. So with much curiosity and little else, he teleported himself to Sukuna’s side and peered down his student’s crotch.
“Huh.” He said.
His hand was cupping Yuuji before his brain had fully caught up, but he didn’t pull away. He let his lips peel in a grin at Sukuna’s startled noise, pressing his middle finger into that warm dip between Yuuji’s legs and watching in fascination as the tattoos receded, Sukuna’s face curling in disgust one second, before a blush blossomed on unmarred cheeks, wide eyes hovering to his face and down to his hand.
And Gojou had meant to let go, it was one thing to molest Sukuna, but not Yuuji, but then Yuuji’s blush reached down his neck as he curled into himself, gripping Gojou’s hand hard enough to be felt past the infinity.
“Sensei,” Yuuji whimpered.
“GOJOU!” Megumi choked, furious for his friend, even though he was more of a bloodied mess and – right, his hand.
“My bad!” Gojou laughed, hands in the air, stepping back one step, two, then rushing back in to catch Yuuji’s unconscious body before it hit the ground.
“You’re not— I’m not letting you — !” Megumi growled a jumble of words, dragging himself towards them with more willpower than awareness.
“Megumi-chan,” Gojou said, voice light as he raised Yuuji to hang over his shoulder. “You saw, didn’t you? It stopped Sukuna.”
“I saw you being a creep — !”
“Sukuna forgot he was going to rip Yuuji’s heart out. He was distracted, and chose to flee rather than fight me. So Yuuji’s asleep instead of dead, do you know what I’m getting at?”
Megumi stared at him, “you can’t be seriously…”
But his complaint fell in empty space, his teacher long gone.
“I’m going to skin you.” Megumi muttered darkly, already stumbling away. The sooner he got medical attention, the sooner he and Nobara could murder their lecherous teacher.
“Oh, you’re awake! How are you feeling, Yuuji-kun?”
Yuuji was already sitting up before his brain caught up to him and he blinked blearily at his teacher sitting backwards on a chair facing the bed, a lopsided grin on his lips.
Reflexively, Yuuji’s legs closed, a blush already hot on his cheeks, “Gojou-sensei!? What are you doing — ? Wait, where am I?”
“Well, I’m glad I’m still sensei to you,” Gojou melted against the backrest of the chair, even if the grin only grew more impish. “You’re in my home! Actually, my basement. Not for any creepy reasons, mind you.”
Yuuji only blinked at him, then he gasped dramatically, “wait that’s right! Sukuna! Fushiguro! Is he okay?! Is Nobara fine!? Did Sukuna hurt anyone — ?”
“Everyone’s fine. A little beat up, but they’ll recover. And I’ve got… interesting news for you.”
Yuuji looked at him, then away. “...it’s about that thing, isn’t it?”
“Mhmm, that thing. Did you feel Sukuna running away too?”
“...Kinda, yeah. I was, uh, a little… distracted.” As if realizing what he just said, Yuuji turned beet red and stammered, “but yeah, Sukuna! He ran away didn’t he? He totally did! All thanks to you… Gojou...sensei…”
“Aha, no need to get all bashful on me, Yuuji-kun!” Gojou said, a bit warmer than before. “I’m sorry you got caught up in all of this. But I can’t ignore the fact that your… body is, how to put it…”
“He thinks I’m gross.” Yuuji said, head dropping a little.
“What do we care what he thinks?” Gojou said, the affection firmer but no less apparent. “But if your body is enough to distract and control him, don’t you think that’s something we could use?”
Yuuji blinked at him, all sweet innocence. “Use how? I already know I have to eat all his fingers.”
“Ah, well, yes, but. I was thinking we could maybe make Sukuna not ever want to come out to play, y’know?”
“...Right,” Yuuji said, still not connecting the dots. “I mean I’m game for less Sukuna but you’ll have to explain properly, Gojou-sensei.”
“I think we can curb him by reminding him constantly that you, and by extension him, have a pussy.” Yuuji found a way to turn even redder as he squeaked but didn’t actually refuse. “I know, I know, but hear me out, it’s only for when it seems he wants to surface, or you’re worried he might take over. And maybe it’ll give us time to find a more permanent solution.”
Yuuji covered his face, “oh god, okay, what did you have in mind exactly?”
“You’re not going to say no?”
“Sensei, the less I think about it, the better, please.”
“You’re such a good boy, aren’t you, Yuuji-kun?” Gojou laughed again. “Alright, alright, let me show you our arsenal.”
He got up, meandered over to a wooden chest by the foot of the bed and pulled out a suitcase. He meandered back to Yuuji and sat in the bed, the open suitcase between them.
“Sensei… I don’t think any of these will fit…” Yuuji mumbled, awe rather than revulsion in his voice as his eyes zeroed on the bigger dildos within.
“Oh, don’t worry about those right now, there’s a whole bunch of much more, ahem, manageable sizes. Even some I hope you could wear on the day to day.”
Yuuji picked at the collection, giggling as the longer dildos flopped a little in his hand, squinting suspiciously at the texturized ones, then grabbing a bullet vibrator and squinting at it.
“What’s this supposed to be?”
Gojou was never beating the allegations, “would you like to find out?”
Yuuji laughed, because of course he did. “Sensei, why do you sound so excited about all this? I guess I’m finding out about all of these eventually, right?”
“I mean, I do want to figure out what works best against Sukuna,” Gojou grinned, hands on his knees. “But why not have fun, while you’re at it?”
“Sensei, this is insane.” Yuuji said, half incredulously. “I mean, I’ve never even done something like this. I’m not even sure if I’ll get it right.”
“Would you…” Gojou heard himself say, no one to stop his impulsiveness or be his self control. “Like some help?”
Yuuji’s eyes met his through his blindfold.
“...Sure.”
“You know, I did say that having you staring would be awkward, but I’m not sure this is better.” Yuuji said from between his legs, yet doing nothing to escape their current position, his warm back against Gojou’s chest. If anything his student only got more comfortable against him, shuffling to lower his pants and underwear without getting off the bed. “Oh, whatever, at least you’re warm.”
Gojou raised his blindfold to stare properly, almost regretting it at catching sight of curly pink hair already dark with arousal.
Gojou Satoru, the strongest, might just die here tonight.
Yuuji squirmed, trying to open his legs while being restrained by his pants still pooled around his calves.
“You can take them off completely, you know that? Nobody’s walking in on you.” Gojou said, softer than he thought he could sound, with his mouth all dry like this. “I’d like you to be as comfortable as possible.”
“I don’t know why that feels so much more embarrassing, I’ll be honest.” Yuuji mumbled, but did as told, wiggling his toes once his entire lower half had been freed. “So. I guess, I should just go for it, huh.”
He went for the small bullet vibrator, then his hand changed direction to one of the plugs, picking a purple one. “Sensei, why are some of these plugs concave?”
“I was told they’ll fit your pussy better. But I also got regular plugs, in case you wanted a classic one.”
Yuuji laughed airily. “A classic, you say. Well, I guess I did know what a butt plug looks like. Am I really gonna be walking around with one of these inside? That’s embarrassing.”
“You’ll do just fine, Yuuji.” Gojou assured him, but grabbed a slim dildo and offered it to him. “For now try this one better. Easier to pull out, and you won’t stress about whether it has to stay inside.”
Yuuji hesitated a second before grabbing it, the plug abandoned by his thigh.
“Right, so.” Yuuji inhaled and lowered it between his legs.
“I do think it’ll slip in, however,” Gojou reached into the case and pulled out a bottle of lube, which he uncapped and brought it down to where the dildo met Yuuji. “Don’t pull it out, I’ll squirt it from here.”
Teacher and student saw the thick glob fall on the purple head then disappear into Yuuji’s folds.
“I… I guess I better…” Yuuji awkwardly maneuvered the dildo to spread the lube on it, twitching minutely at the stimulation.
“Good boy,” Gojou said and felt every tremor that wreaked his student’s body.
“So I don’t — Of course I know how it’s done, but like,” Yuuji continued to talk even as he poked the dildo shallowly into himself. “I’ve heard it can hurt, but can it go too far? Like not all of this goes in, does it? Where would it even fit, y’know?”
Gojou lowered his infinity to hug Yuuji close to himself and laugh into his shoulder. His student squawked but didn’t protest the extra closeness. “This is what today is for, you can explore. And piss Sukuna off if he’s anywhere close to the surface.”
“He was. A bit. I was… like I’m nervous, and at one point he thought he could bully me into giving him control then he… well, saw us. And dipped.”
“This plan is already a success. Nice job!”
Yuuji laughed, and pressed the dildo in, just slightly. “Awkward question time, sensei.”
“Hmm, what is it?”
“So I don’t… really know where my hole is.”
Still pressed to his shoulder Gojou huffed a laugh, “really? You haven’t messed with it even once?”
“Not really. But it shouldn’t be that complicated, right? I’m not accidentally poking my butt. Right?”
“It would be hard to mistake it, yes.”
“Oh okay. So here goes nothing, I guess.”
He angled his hand down and poked around with the dildo until it snagged on something, and then it finally started to sink.
“Oh,” Yuuji breathed out as the head disappeared, his free hand tangled in Gojou’s pants, his body curling into itself. “Huh, that’s weird.”
“Weird good? Or weird bad?”
“Good, I think.” Yuuji pushed it in a bit more, tortuously slow. “Feels full though. I don’t think anything bigger will fit.”
“Well don’t give up so quickly,” Gojou mumbled against his skin before finding enough self restraint as to not bite his student’s neck. “You’re doing so good.”
“Can I keep going? I think just… Honestly, I’m not sure what’s happening anymore.”
“It’s cute how chatty you are.”
“Sensei!”
“I’m not wrong, see? You’re even clenching at the praise, aren’t you?”
“You can’t see that!”
Gojou pressed him against his chest. “But I can feel it, sweetheart.”
Yuuji mumbled under his breath but resuming moving his hand, in and out, shallowly, then dipping further inside. On and on until most of the dildo had disappeared inside him.
Yuuji’s breath had grown labored, hips canting upwards just a bit, as he pulled out, just as slowly, then sank back in.
Yuuji finally moaned, soft and surprised and the world blurred around them, Six Eyes focused on one single person.
“Faster,” Gojou whispered in his ear, and Yuuji obeyed, gaining speed with each thrust until he was pistoning in and out with that beautiful slightly-more-than-human strength of his.
Gojou’s hands had dropped to his thighs, with the intent of not letting him close his legs, but he kept spreading him, more and more, as the dildo moved.
Yuuji didn’t stop but caught his breath enough to complain, “sensei, sensei! I’m not that flexible! Stop! Stop!”
“Sorry, sorry,” Gojou laughed, shifting his hands to grip his hips instead, gripping harder as Yuuji neared climax.
Yuuji came hard, his entire body tremoring as his first orgasm sped through his body. He had stopped moving, and Gojou could have let it be for his first time.
Except since when had Gojou exercised self-restraint since he cupped his own student’s pussy?
He grabbed the dildo Yuuji had let go off, and resumed pounding him with it, Yuuji finally being vocal about it.
“Ah, sensei, no, wait, stop — !” Yuuji mumbled half incoherently, punched out moans leaving his lips, overstimulation overcoming him, not yet coming down from his first orgasm when his body started preparing for the next. “Ah, too much, faster, sensei, faster — “
And Yuuji was coming undone once again, this time by his teacher’s own hand. Gojou circled the dildo, milking the moment for all its worth then finally pulled the whole dildo out, Yuuji keening softly in surprise.
“How we feeling? You did so good, Yuuji.” Gojou said, lifting the wet dildo up for them both to see. “See how much fit into you? All of this was inside.”
“Sensei, that’s embarrassing!”
“It’s not! It’s wonderful!” Gojou said, half a tease, as he dropped the dildo in favor of caressing Yuuji’s exposed skin, idly “So?”
“Hmm? I feel okay. Tired, wow, I’m tired, but it was good.”
“Great!” Gojou cheered, picking up a slightly fatter dildo. “That means you’re ready for the next one!”
“Gojou-sensei, wai — ah!”