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Wake up, brat.
Sukuna’s voice cracked through his head like thunder. He couldn’t move, couldn’t open his eyes. A heavy, seasick grogginess closed over his brain, dragging him back down into blackness.
Oh, no you don’t. I want you awake, for this. It's going to be fun.
Sinister glee scintillated in the demon’s voice as he dragged Yuuji’s consciousness out of the hazy dark.
Light slapped his unprepared eyeballs and his hand flew up to cover them. Not a bright light. A bedside…lantern? What the hell? He didn't even own a lantern.
Hey. Pay attention. Don’t ruin my reputation.
“W—what?” Yuuji mumbled.
“What the fuck are you doing,” a breathless voice demanded. “Don’t just stop, like that. I don’t like being edged.”
Yuuji rubbed his eyes and blinked blearily. It was a man’s voice. There was a man in front of him. A naked man, on all fours. Yuuji was kneeling behind him, on a bed, with his dick buried to the hilt in his ass. When he saw the back of a snow-white head, his heart nearly leapt up his throat. Sukuna strangled him, as he opened his mouth to shout.
Think before you do anything stupid. Look at him. That’s your precious sensei. Isn’t this what you’ve wanted to do to him, all along? Haven’t you thought about this every night, when you jerk off in the shower? Now you have a chance to do it for real. Unless you fuck up and he finds out it’s you.
“But…how? How did this happen?”
He thinks it’s me. Shut up and keep fucking him, before he gets suspicious. We can talk later.
All of this internal dialogue took place within about a second, while Yuuji looked down at himself. The black tattoos and claws were still there. So it was true. Gojo-sensei thought he was fucking Sukuna. And Sukuna wanted Yuuji to keep going.
But, he couldn’t do it, right? If Gojo-sensei thought he was someone else, wouldn’t that make Yuuji a rapist? On the other hand…it was Yuuji’s body. Gojo-sensei had been doing it willingly, knowing that. Didn’t that kind of make Gojo-sensei the rapist?
Not that he would make a complaint, or anything. He couldn’t deny how badly he had wanted this. How hard it was to keep his eyes off his sensei. How he thought about him every moment. Obsessed over him, to the point where he was starting to lose weight, and have trouble focusing in training.
Trembling between fear and ravenous, unhinged desire, he reached out and put his hands on his sensei’s hips. Gojo arched his spine tilting his taut, round ass up higher, in response.
“Fuck me hard,” he said hoarsely. “I want to feel—hngh!”
Yuuji’s strained thread of willpower snapped and he plunged all the way in, almost before he knew it. Of course, once he’d begun, it was so easy go on. He’d never had sex before, but it wasn’t like he needed instructions. All he had to do was engage his muscles and keep thrusting hard, slamming his pelvis against his sensei’s ass with wet thuds, burying his steel-hard dick in the divine, velvety heat, inside him.
“Ha…fuck! I’m so close!” Gojo panted. “Don’t stop. I’m…ungh! I’m c—I’m coming! Fuck!”
Yuuji kept hammering into him while he came, his thighs shaking and his swollen hole squeezing and sucking on Yuuji’s shaft. If he wasn’t so terrified of being discovered, the moment they made eye contact, he’d have liked to see his sensei’s face, while he made him come on his dick.
That thought alone put him over the edge and he shot like a bottle-rocket, unloading hot, rapid bursts of slippery seed, into his sensei’s twitching asshole.
Drunk on the absolute ecstasy of coming inside the man he’d been tormented halfway to insanity about for months, he let his full weight collapse on top of him, pushing him flat on his belly, feverishly kissing and biting his neck, while he rode out the spasms.
“Get off me, you fucking animal!” Gojo demanded, writhing beneath him. “I can’t believe you came inside again, what did I say last time?”
Yuuji pushed himself up and sat back on his knees, trying to look as much like Sukuna as possible, by adopting a deranged grin, and shamelessly ogling his sensei’s (truly magnificent) naked body. Apparently, that was the right thing to do.
“Why are you always looking at me like I’m food?” Gojo sneered, throwing a towel at him. “Get out, before the kid wakes up. Wait—shower here, so no one sees you. Then get out.”
Let me drive, brat. You’ll give yourself away.
Feeling more than a bit relieved, Yuuji consciously receded and let Sukuna take over.
“You better hope that shit you’re giving him doesn’t damage his brain,” Sukuna taunted, the moment he had control. “If it does, I might just stay on top, permanently.”
Gojo spun around, his eerily beautiful eyes flashing blue fire. “I would never do anything to hurt him! You know as well as I do it’s just a weak cursed herb. His yang energy burns through it so fast, I’m shocked it even works.”
“If you don’t want to hurt him, then why do any of this? Why don’t you just ask him to fuck you.”
“Because he’s a kid, Sukuna! It would be—”
“Wrong? But drugging him and using his body is fine with you?” Sukuna laughed aloud. “Holy shit, Satoru, your moral compass might be more fucked than mine. I’m impressed.”
Gojo sat on the edge of his bed, rubbing his hands together and frowning at the floor. “I know how fucked up I am, old monster. I’m hardly even human, anymore. Someone like Yuuji…I could never ask him to—wait, I’m not talking about this with you! Shower and get out!”
Yuuji took over again, as they walked through the moonlight-speckled dark beneath the trees, toward the student housing. He was sick to his stomach with guilt and other conflicting emotions, and just wanted to think, but Sukuna was in the mood to gloat.
Hear all that, brat? Your precious sensei is a pathetic degenerate, who’s been drugging you so I can come out and pound him senseless. Hahahaha! By the way, how’d you like fucking him? He might be rotten as hell, but his body is one in a million. I’ll give him that.
“I thought Gojo-sensei was invincible,” Yuuji murmured. “No matter what happens, he’s always calm and smiling, like nothing can touch him. I’ve never seen him look so sad.”
Are you crying? Fuck me, you are so boring. Don’t you want to know how many times I’ve made him beg for your cock? Or how he’s been feeding the herb to you, at least?
“I don’t care,” he sniffled, dashing away a tear. “Gojo-sensei…I would die for him. He can do anything he wants to my body.”
Ugh, don’t tell me. Are you in love with him? Disgusting, I’m gonna be fucking sick. I wish I could force you to hack up my fingers and give them to that Fushiguro boy. He’s got a death wish and a moral grey area a mile wide. He’d be a lot of fun to play with.
“Why don’t you leave me alone. You made me miserable, so you got what you wanted, right? What’s the point of talking.”
Tch. I was doing you a favor, brat. You wanted to fuck your sensei and now you have. If you’re so ungrateful, I’ll just let you sleep through it next time.
“There won’t be a next time. I’m going to tell him.”
Hahahaha! I’ll believe that when I see it!
“Think whatever you want. I will.”
How do you think he’s gonna feel, when he finds out it was his sweet little student, who was balls-deep in him?
“Shut up.”
You think he’ll thank you? You think he’ll be grateful? Or will he never want to see your face again? If you wanted to tell him, you should’ve done it the minute we switched. But you didn’t. You fucked him, and you let him think it was still me. You raped him.
“Shut up!” Yuuji said, not even bothering to wipe away the tears that were streaming down his face. “I don’t care what you say. I don’t care if he never forgives me. I won’t let you trick him, again. I—I won’t let you play with us, again.”
Well. We’ll see.