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Yuuji has no idea how the whole situation came about.
It probably started with Nobara complaining about a new lipstick that didn’t end up matching her ‘color’ (whatever that means), then she’d accidentally left it in his room after saying something about giving it to someone else, but it’s been weeks and it’s still in his room…
At any rate, it ends up with Yuuji holding up an almost new tube of lipstick. It’s pretty, a light pink color. It looks like it would match his hair. He hesitates, eyes flicking up to the mirror he’s standing in front of.
Though it’s a communal boys’ bathroom, Megumi is out for the day and the second years are in another building so there’s no chance of running into anyone else. Even still, Yuuji finds his stomach buzzing with nerves. For what? He doesn’t really know.
Swallowing, Yuuji steels himself and leans over the sink further, the edge of the porcelain digging into his hips, lipstick held awkwardly in one hand, the pink bright in the fluorescent lights. He just wants to see what he looks like with it on, there’s nothing wrong with that!
Dragging across his bottom lip, Yuuji is expecting more resistance than he gets, the lipstick moving much smoother than he expected and instantly he gets some on his chin. Wincing, he pulls back and resolves to keep going.
He’s attempting to fill in the color on his top lip when a call of his name makes his hand jerk and a long line of pink streaks across his cheek.
Yuuji's blood freezes his veins as he raises his eyes in the reflection to see Gojo-sensei in the doorway. “Uh…” he says, eloquently.
“Whatcha doin’, Yuuji-kunnnn?” Gojo-sensei sing-songs, voice sugary sweet as he slinks closer, like a predator stalking its prey. Yuuji gulps.
“I, um.” For a moment, he considers lying. Trying to cover up what he was attempting to do, but standing there with lipstick smeared over his face and holding a tube of lipstick in his hand, it's pretty obvious and he discards the thought with a sigh.
He settles back onto his flat feet from where he’d been up on tiptoes trying to get as close as possible to the mirror—as if that would help his aim—before turning to address Gojo-sensei head-on. “I wanted to try on some of Nobara’s lipstick, but I’m no good at it.” He wipes at his face with the back of his hand, glaring at the pink that follows the motion, shimmering innocently on his skin.
Gojo-sensei hums, cupping his chin in his hand and tilting his head back and forth, looking Yuuji over. Then he nods as if he’s made a decision.
“I can help Yuuji with that!” he says brightly and before Yuuji can say anything, he wraps his long arms around his waist.
Teleporting with Gojo-sensei feels like someone hooking something in his guts and swiftly yanking. It’s over within seconds but it’s always disorienting. As he blinks stars from his eyes, Gojo-sensei pushes him onto a couch and he falls, limbs flailing.
“Stay there!” Gojo-sensei commands, grabbing the lipstick tube Yuuji is somehow still holding and flouncing away.
Yuuji stares after him, a little confused about how they got here, but he shakes himself and decides not to think too much about it. With Gojo-sensei, it’s always easier to go along for the ride rather than fight against it.
He doesn’t wait long before Gojo-sensei comes back, arms so full he has to juggle everything awkwardly so it doesn’t fall, and he dumps the pile onto the coffee table before kneeling in front of Yuuji. It’s not completely surprising, Gojo-sensei always seems to like to put himself lower than his students, but this feels a little different as Yuuji squirms, lipstick tugging on the skin of his face awkwardly as he grimaces.
“First let’s get you cleaned up!” Gojo-sensei says as he gleefully rips open a package and pulls out a wet wipe. Gentle fingers cup around his chin, tilting his face slightly to the side.
Yuuji stays as still as possible as Gojo-sensei starts cleaning off his face, his motions soft. At one point, when the silence becomes too much to bear, he tries to argue. “I can do it myself…”
Pointedly, Gojo-sensei ignores him. He can’t see his eyes under the blindfold but even still, the air feels heavy with intensity, as if Gojo-sensei hasn’t looked away from him once.
That makes sense!! Yuuji tries to argue with himself. He’s cleaning your face!!
After Gojo-sensei is done, Yuuji licks his lips absent-mindedly and wrinkles his nose at the unpleasant taste that lingers behind from the wipe. Gojo-sensei chuckles at him.
“Okay! Now, I’m going to reapply the lipstick.” He holds up the tube. Yuuji nods numbly, a little perplexed about what they’re doing here.
Still, when Gojo-sensei shuffles forward and straightens up onto his knees so they’re almost eye-to-mask, he jolts with a little more awareness. “Er, Gojo-sensei, you don’t have to do this.”
“I want to!” Gojo-sensei chirps. “Open your mouth a little.” He parts his lips to demonstrate. Yuuji’s eyes bounce down to them and stop to stare, his mind buzzing for a moment before he remembers himself and swallows. Forcing his gaze back up, he lets his mouth fall open.
“Perfect, perfect,” his sensei says. The distracted praise makes his stomach fill with squirming warmth. The lipstick drags across his lower lip, agonizingly slow. Distantly, Yuuji is glad for the blindfold, as he has nothing else to look at besides Gojo-sensei’s face as he looms way too close into his space.
The hand not putting on make-up is resting on Yuuji's shoulder, and the warmth from his palm radiates out, forcing Yuuji to focus on it—the strength in the grip—and the knowledge that if Gojo-sensei wanted, he could pin Yuuji down with that hand alone, with little to no effort. The thought makes goosebumps erupt down his arms.
After the bottom lip is done, Gojo-sensei leans back just a touch with a hum.
“Something wrong, Gojo-sensei?” Yuuji asks, pursing his lips. Gojo-sensei tsks at him.
“Keep your mouth open, Yuuji,” he orders. He hooks a thumb under his blindfold and drags it up to his forehead, keeping his hair out of his eyes. “I just need to see better. The upper lip is always the hardest part.”
The hand on his shoulder travels up his neck before pressing its fingertips into the edges of Yuuji’s jaw, keeping him in place as Yuuji’s eyes widen. Wordlessly, Gojo-sensei gets back to work, but Yuuji feels like he’s spiraling.
Because it’s much, much worse to do this while staring into Gojo-sensei’s baby-blue eyes, so heavily focused on his own lips.
Yuuji feels like he might keel over, but before the panic can set in too much Gojo-sensei pulls away with a large smile. “All done! Just one more step!” Then, without further ado, he sticks a long finger into Yuuji’s mouth. His smile sharpens at the corners as Yuuji makes a surprised, garbled noise. “Purse your lips,” he instructs.
Thoroughly confused, Yuuji does so, and Gojo-sensei slowly, so slowly, drags his finger out of Yuuji’s mouth.
Heat builds in his stomach and Yuuji fights not to squirm in place, knees knocking against each other as his legs jolt, tensing, as if to spring up. But he doesn't want to move, doesn't want to fight to get away.
When Gojo-sensei’s finger finally withdraws, he cheerfully shows him the digit. There’s a smudged pink ring around it. “You have to do that to get off the excess, so you don’t get it on your teeth!” Gojo-sensei explains happily.
“A-ah, okay.” Yuuji feels dazed. Gojo-sensei's happy-go-lucky attitude is at odds with the hormones buzzing underneath Yuuji's skin, wanting him to read into this situation—that it isn't just his sensei helping him out with the lipstick but something more.
Gojo-sensei hums under his breath as he grabs a hand mirror, lifting it up. Yuuji blinks a few times at his reflection before he instinctively reaches out to wrap his hand around the handle, covering Gojo’s own and pulling the mirror closer.
The lipstick… looks good. It almost perfectly matches his hair, and, with the way his cheeks are already blushing from the situation (and Gojo-sensei’s finger in his mouth), he looks nice.
It’s not a drastic change; Yuuji still looks like himself, and he doesn’t think he’ll be doing this again anytime soon. But the whole reason he started this was sheer curiosity and honestly, the results aren’t bad at all.
Smiling widely, he glances up at Gojo-sensei. “Thank you, Sensei! I love it!” Looking back down, he misses the flash of emotion that ripples over Gojo’s face, not that he would have been able to name it even if he had. Instead, he tilts his head in the mirror, twisting his lips and trying to look like those models that everyone stares at—‘sexy’ or whatever, though the way he puckers his lips makes him look silly rather than attractive.
Laughing a bit at himself, Yuuji catches Gojo-sensei’s eye again, just to feel his heart rate skyrocket. Sensei’s face is much closer than it had been. Gently, Gojo-sensei places the mirror onto the coffee table, and when he lets go, Yuuji does as well. They're still staring at each other, and close enough that Yuuji can feel Gojo's breath on his face.
“Yuuji,” Gojo-sensei says, and his voice is so ragged that Yuuji shivers, “it looks good on you.”
Long fingers ghost across his cheeks, and Gojo-sensei’s stare is the most intense thing he’s ever seen. He feels like he might burn up from the force of it.
“T-thanks,” he stutters. He doesn’t think he’s ever stuttered as much as he has during this single conversation.
Gojo-sensei gets that look in his eye, the one that promises mischief. “Do you want to mess it up a bit?”
Yuuji feels like his brain is firing on half cylinders. Mess it up? What? The lipstick? “Um. Sure?” He’s not sure what they’re talking about, but Gojo-sensei has never led him astray, even if his methods can be a little strange.
One large hand cups the back of his neck, and before he can comprehend the movement, warm lips descend over his. He lets out a little mmph of confusion before his eyes flutter shut automatically.
See, Yuuji has had a crush on his sensei for… a while now. So even if he’s unsure how they’ve gotten here, he’s willing to go along with it. Scratch willing. Happy to go along with it.
A thumb presses against his jaw, encouraging him to tilt his head, and Yuuji groans as their lips slide against each other. The lipstick makes it easier, makes their lips glide, it's almost slippery and leaves an aftertaste that Yuuji's never tasted before. It makes it one of a kind.
He feels so hot. Yuuji has never felt like this before. He’s kissed a few girls sometimes in middle school, but never someone like Sensei. Never someone who he actually liked.
When they pull apart, some unknowable amount of time later, Gojo-sensei’s mouth is smeared a bright pink. It clashes with his pale skin, but Yuuji finds himself hopelessly enamored. Without much thought, he leans forward to press his lips against Gojo’s cheek. When he pulls back, he’s treated to a lipstick mark in the shape of his lips, though it’s obviously faded from them swapping it back and forth.
Gojo-sensei chuckles, sounding terribly fond, which lights Yuuji up from the inside out. Soft lips capture his once more, but this time a tongue licks against the seam of Yuuji’s mouth. Yuuji gasps, and Gojo-sensei wastes no time slipping his tongue inside, prodding against Yuuji’s, encouraging him to clumsily copy his movements.
They lick and curl around each other, and his scalp feels like it’s going numb with the way that electricity flows through his body, making the hair on his arms stand on end. When Gojo’s fingernails scrape through his hair, Yuuji feels his eyes roll to the back of his head as he groans around Gojo-sensei’s tongue.
Yuuji loses himself to the feeling, his arms wrapping around Gojo-sensei's neck without any input from his brain. When they finally part, Yuuji is panting basically into Gojo-sensei’s face like he’s run a mile. Luckily, it doesn’t seem like Gojo-sensei minds being basically breathed on, judging by his satisfied smile.
A thumb caresses Yuuji’s cheek, soft as anything. “The lipstick looked good on you, but I think I prefer you like this.”
“Like what?” Yuuji asks, still feeling a bit dumb.
Gojo-sensei’s smile sharpens into something else. Something naughty and filled with promises. Yuuji swallows.
“Breathless, like you couldn’t imagine being anywhere but here. Doing anything else besides this.”
Yuuji squints. Gojo-sensei adjusts his knees slightly. With the way they’re so close to each other, they’re practically eye-to-eye. He lets his finger rub against the shell of Gojo-sensei’s ear.
“What, kissing you?” Yuuji says with his usual straightforwardness. “Duh. What else would I rather be doing?”
It seems like everything about Gojo-sensei’s aura brightens, though Yuuji can’t really put his finger on exactly how he knows that.
“Good answer,” Gojo-sensei says with a giggle, letting their noses brush against each other. His eyes are already half-lidded. “But I don’t think you’ve had enough time to make a solid decision. Let’s test it a little longer to make sure, eh?”
Rolling his eyes, Yuuji silences Gojo-sensei’s next giggle with his lips.