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Denji and Yoshida don’t hang out too often. Sure, they may have one thing or another in common, but most of the time Denji is too busy with work or running errands for Hayakawa that neither of them get to see one another too often. The only time they’d really have to spend together is when they are in some of the same classes, and even then, they don’t have too much time to really talk with one another.
It's a fact that Yoshida hates but has learned to accept, even as he watched Denji stride into class one day, looking more cheerful than he usually did. It wasn’t his place to ask the blond what was making him so happy, so he’d just stayed silent, glaring down at his textbook like it held the most valuable information in the world.
This particular day, though, Denji stops, standing beside him and looking down at where Yoshida sits as he tries to get a good look at the other boy’s face.
“Hey, could I, um…could I ask you for a favour?”, Denji asks him, and Yoshida nearly shoots up out of his seat in excitement. He’s only ever been able to admire him from afar before, but this…this might be a way for the two to get closer. So. Much. Closer.
“Sure, what is it?”, Yoshida answers, trying his best to keep his tone flat but still sound like he was slightly interested without giving too much away. He stares back at Denji and silently hopes that the blond can’t see the anticipation bubbling up inside him.
Denji yawns before snapping his jaw shut, grinning sheepishly. “Um…so this is kinda embarrassing, but I’ve never been good with academics, ya know—so, anyways, I was wondering if maybe I could come over to your place and you could help me study?” A far too eager “yes!” leaves Yoshida before he can even think about a suitable answer, and he can already feel heat filling his cheeks, spreading down his neck and disappearing beneath the collar of his shirt.
“Cool…”, Denji mutters, not even seeming remotely thankful for the help that Yoshida just offered as he turns and takes a step towards his seat.
That’s when Yoshida sees it.
The string of a black thong peeking out over the waistband of Denji’s uniform pants when he goes to sit down. It takes Yoshida a minute to fully take in what he sees, but when he does it makes his heart race and his cock twitch in his pants. Fuck.
Although, he supposed if he was going around sporting a secret like that everyday that he’d be pretty cheery too.
Yoshida wants to say something, needs to even, but he settles for nothing instead.
He wonders if he should call off their study session, after all, how the fuck did Denji expect him to be able to even think about the things he needed to teach him if he was already thinking about teaching him how to do so much more.
This was either going to be a disaster or the best day of Yoshida’s damn life.
The rest of Yoshida’s day goes by torturously slow, and all he can think about the entire time is that fucking thong that Denji was wearing. Where the hell did he even get it anyway? It was a question that honestly didn’t need to be answered, not when there was so many more that would be far more valuable to him.
Yoshida sat on the wall outside as he waited for Denji to come out. The cool autumn air sent a chill up his spine as he tried his best to stop his thoughts from wandering to the most sinful places that they could. But no matter what he tried, none of his thoughts were going away.
I bet he fills them out so fucking nicely.
Get him to strip for you.
She’d look so fucking pretty under you.
Woah! Yoshida choked on his own spit when the last thought entered his head. She? What the fuck was he thinking? Denji was a guy, not a girl. It didn’t matter what fucking underwear he wore it didn’t give Yoshida any right to think of him like that.
But you like it, don’t you? Pervert.
“Hey, you okay?”, Denji asked, now somehow in front of Yoshida—and how the fuck had he not seen him approach him before now. Yoshida shook his head, trying his best to clear the thoughts from before. “Y-yeah, everything’s good. Just lost in thought”, he responds quickly—and he could have sworn that Denji just smirked at him, but now the blond’s back is turned to him and he’s already walking towards the school gates, telling Yoshida to “hurry the fuck up, man!”
His legs are carrying him on their own, he can’t even think a coherent thought right now, but somehow, he manages to make it home without even really remembering how he got here. Denji’s been talking to him the entire way there, that he’s sure of, but if you asked Yoshida to repeat anything he’d just said he wouldn’t have been able to do it.
Fucking damn it, Yoshida! Get your shit together!
Yoshida wanted to punch himself in the face. How was he supposed to help Denji if he couldn’t even think for himself?
“You sure you want me to help you?”, Yoshida asks, silently hoping that Denji would change his mind. But when he didn’t, only giving a small nod in response, Yoshida wanted to cry. He wasn’t going to jerk off in the bathroom when his classmate was on the other side of the wall. No. Even he wasn’t that bad.
Pulling his keys from his pocket, Yoshida opened the front door of his apartment, pushing his way inside and closing the door after Denji stood behind him. “My room’s this way”, Yoshida mutters, still almost completely unable to look the blond in the eyes.
Denji follows him without hesitation though, like he does with most things, and soon the pair are standing in Yoshida’s room. It’s simple enough that Yoshida doesn’t get too distracted by anything while he’s studying, but still individual enough to show off his personality.
Denji looks around the room like he’s laid his eyes on pure gold, but Yoshida honestly doesn’t see what all the hype is about. There’s nothing overly expensive or ‘cool’ in his room, so he’s not sure why Denji loves it so much.
“We can sit on the bed if you’d like. It’s probably more comfortable anyway”, Yoshida says honestly, and Denji shrugs. “Sure.”
They take out their books from their bags without too much conversation and before Yoshida realises it, he’s already completely invested in helping Denji with their schoolwork. That is until Denji shifts slightly to stretch out his legs from under him and Yoshida catches another glimpse of that fucking thong.
He doesn’t say anything though, and the pair continue until Denji is able to repeat most of what he’s learned back to Yoshida without having to look at his notes for guidance. Yoshida smiles, oddly proud.
“Y’know…you might be the only person who hasn’t gotten frustrated with me when they’ve tried to teach me something”, Denji says, almost sadly, looking at the blankets that cover Yoshida’s bed, avoiding his eyes completely. Yoshida reaches over and places his hand on Denji’s thigh, getting the other boy’s attention.
“What’s there to get frustrated about? Everyone picks up things at their own pace, right?”, Yoshida replies, and Denji’s eyes light up at that. “Yeah! You’re right.”
The pair sit in silence that changes from comfortable to awkward really quick and Yoshida tries his best to stay silent, but his mouth is moving before he knows it and what comes out of it is far from the best thing he could have said.
“Why are you wearing a thong?”, he blurts out and watches as Denji keeps silent, his cheeks turning a deep shade of red as the blond averts his gaze. Another moment of silence passes before Denji gives him the answer he would have expected the least.
“I was kinda hoping you’d notice…”, Denji says, tone embarrassed as he finally looks him in the eyes. There’s a certain innocence to the sly smile that he gives him that doesn’t quite reach his eyes, which are filled with lust and a kind of want that leaves a shiver running down Yoshida’s spine. It’s exhilarating, and Yoshida can already feel his heart beginning to race as Denji takes Yoshida’s hand in his own and brings it up to the waistband of his pants.
“I wore them for you, Yoshi…don’t you wanna see?”, Denji asks, the shyness he once showed long gone now and replaced with something else. He knows exactly what he’s doing to Yoshida, and fuck, Yoshida would be lying if he said it wasn’t working. Denji’s voice, the look he was giving him, the way his fingers rubbed over the back of Yoshida’s hand while he waited for the other boy to make his move.
Yoshida smirked, his eyes darkening as he pops the button of Denji’s pants open. “Stand”, he orders, and Denji complies, almost too quickly as he almost trips over himself trying to get off Yoshida’s bed. When he does, however, Yoshida’s hands are on him in an instant, gripping the belt loops of his pants and pulling them down his legs more and more until Denji finally steps out of them, leaving him in his uniform button down, tie and the sexiest black lacy thong that Yoshida had ever seen. Not that he’s seen many.
“C’mere, baby”, Yoshida coos, patting his lap lightly, gesturing for Denji to sit. Yoshida takes a moment to push their books and notepads to the side before the blond approaches him, climbing into his lap as he grips the collar of Yoshida’s shirt, a whimper escaping him as he grinds down on Yoshida’s clothed thigh.
“Aww…desperate already, sweetheart?”, Yoshida asks him like they both don’t know the answer already. His words earn him another whine from the blond, and he chuckles against the other boy’s neck when he feels him move against him again, chasing whatever kind of friction he can get.
A thought goes through Yoshida’s mind then, one that’s almost too risky to voice, but there’s no turning back now, he supposes, not when he has a pretty thing like Denji in his lap practically begging to be fucked.
“Such a good girl for me…”, Yoshida praises, his voice low, testing the blond’s reaction as he kisses his way down the other boy’s neck, stopping to suck lightly on his pulse point. A moan slips through Denji’s parted lips, and Yoshida takes it as a sign to continue. He pulls back for a moment, making a show of glancing to and from Denji’s eyes to his clothed cock before he speaks.
“Show me”, his tone is firm when he speaks, leaving no room to argue. He’s just lucky that Denji is the kind of person to bend to his every command, so he doesn’t wait long before he watches Denji spread his legs slightly.
“Fuck…”, Yoshida curses, his voice shaky as his eyes zone in on the wet spot in the front of the thong, almost invisible if he hadn’t been looking so hard. His breaths are catching in his throat now, a sure sign that he’s completely done for, but he doesn’t let it show, not even when Denji pulls the lacy fabric to the side to show of his achingly hard cock, the head already shining with precum.
“Such a naughty girl…”, Yoshida drawls, “you think you can just wear pretty little thongs like a slut and think I wouldn’t notice, huh?” Denji moans again, this one louder and obscener than the last, and Yoshida swallows it down as he pulls the blond in for a kiss, crushing their lips together.
Denji’s fumbling with Yoshida’s pants, desperately trying to get them open. When he does, Yoshida helps him out by removing them completely. It will be easier if they’re out of the way anyway.
Yoshida’s groans when a warm hand wraps around his cock, stroking lazily. “Fuck, fuck…good, baby—so fucking good…” Yoshida breathes, and Denji practically purrs against him, revelling in the other boy’s words, “can’t wait to fuck your pussy, baby.”
“Yoshida!”, Denji complains, and Yoshida chuckles, a low sound that resonates in his chest that makes the blond bite his lip.
Yoshida shifts closer to him, bringing their cocks together before lacing their fingers together to create a tunnel. Yoshida tightens his grip as the to begin to move, thrusting up against one another. Pleasure ignites in his body when he keeps moving, his pace growing faster and faster, Denji matching it as they desperately try to reach that feeling they both crave so much.
Denji comes first, covering both of their hands along with the blankets, Yoshida following close behind. Yoshida is panting hard now, coming down from his high as he tries desperately to recover some of his blacked-out vision. He can hear Denji beside him, mumbling something unintelligible as he slowly reaches out to grab a tissue from the box on Yoshida’s bedside table, cleaning himself up the best he can.
When Yoshida finally recovers, Denji is looking at him with the usual relaxed smile on his face, except this time Yoshida knows he wants to say something. He sighs. “Yes?” Denji chuckles.
“I think there’s a lot more that I could learn from you, after all, I’d be a bad girl if I didn’t get good grades, right?”