Work Text:
Initially Denki was all about letting Katsuki take the lead. Not like he really had much of a say in it, to be frank, but he very much enjoyed following Katsuki into the deepest depths of mischief only to return home hand in hand, no matter what sort of trouble they got up to.
And they got up to a lot sometimes.
Katsuki's really that type of guy who just charged right on into the thick of it, but he's certainly never boring and always makes up for his antics in some way or another. Maybe Denki is an enabler.
Whatever the case, he really dug it.
So, when Katsuki had grown tired of the heavy bass pounding in their ears and the pushing and shoving of the patrons around them, (perhaps he'd gotten soda or something sloshed on his jacket again and finally had enough,) Denki doesn't complain when he feels a calloused, warm palm close around his and doesn't drag his heels as he allows Katsuki to steer him into the nearest unoccupied room in the house of the party they'd crashed out of spite.
It's really not the first time Denki had been whisked away into the closed confines of a semi-clean bathroom to be sat atop the sink and kissed silly, but it's the very first time Katsuki had ever taken a route such as this. He isn't necessarily a touchy feely guy in the first place, and Denki gets it.
Which is why it is incredibly disheartening when Denki finds out the hard way that Katsuki just really really fuckin' sucked at kissing.
Like, he was seriously bad. But it also wasn't necessarily surprising.
He'd bonked his head on the wall a couple times in the wake of Katsuki's enthusiasm, and even when a broad hand came up behind his skull to cushion it against the tile he still found himself hissing a protest when their noses bumped together painfully, or when Denki briefly needed to break away from the assault to wipe away the spit dribbling down his chin.
Lord knows the dude was trying, bless his heart, but after the third incredibly uncomfortable clack of teeth on teeth he finally cried uncle in the way that Denki tried to ease Katsuki off ofhim in a firm and unoffending way.
Katsuki only understood one half of the whole.
"What?" he grunts, stepping back only a smidgen as he allows Denki to heave in a lung full of air and let it all out in a drawn out wheeze.
"Dude," he gasps, "bro, what're you trying to do, bite my lips off? That kinda hurt, man."
It isn't the critique he's expecting. Thoroughly stung, Katsuki takes a bigger step back, rarely seen embarrassment knitting his brow together as he found the grit in the tiled floor far more interesting than Denki was.
"The fuck am I supposed to do then, learn about this shit from those cheesy romcoms you make me watch?"
"Absolutely not," Denki balks, "actually I kind of thought that was what you were doing, because those actors are just shi-- oh, oh that was what you're doing, isn't it?" The tips of Katsuki's ears darken as he tucks his chin to his shoulder, now facing entirely away from Denki and looking to make a beeline to the door out of sheer embarrassment.
"Aw no man, wait!" He catches Katsuki by the wrist as he mutters something barely audible, something that sounded a lot like well i don't just do this shit for fun as he ducks for the door. "Dude it's totally okay not to know what you're doing, I'm not dissing you. Kissing is an art."
"An art?" he parrots back in disbelief.
"Yeah. Seems like it'd be a super simple thing, huh? Turns out you need a shit ton of practice to actually get the hang of it, so don't get so down."
The muted bass on the other side of the door is the only sound that passes between the pair as the gears click inside of Katsuki's brain, seldomly interrupted by the jeering of other party goers from the outside. Denki takes it upon himself to flick the lock into place as Katsuki finally asks, "you mean it's not just crushing your lips onto someone else's?"
This is an instance where he was much more than happy to take Katsuki by the hand, which is what he does, and says, "don't sweat it, Kacchan. I'm a pretty good teacher."
"You are definitely not."
"Oh, sure I am," Denki insists, leaning forward to hook his thumbs into the beltloops of Katsuki's pants and tug him much closer, away from the door and back to where he stood only moments ago. He lets his eyelids flutter halfway closed, lets a smirk curl his lips upwards as he implores in saccharine tones, "I'll show you baby, I'll teach you if you want me to."
That gets through to him at least, judging by the way Katsuki's breath hitches and a rosy tint of blush begins to bloom on his cheeks.
Denki decides it looks quite lovely underneath the flickering fluorescent light.
"Okay?" he asks, gently pushing Katsuki back.
"Okay," he whispers, uncharacteristically timid, and Denki pops up on his tiptoes to press his lips to Katsuki's gently.
It takes a hot minute. It's kinda like kissing a stone statue with the way Katsuki held his lips taut and tight. But careful encouragement loosens up the tension when slender fingers rove across Katsuki's jaw, sweeping away the tension and coaxing hard planes into something softer when he angles his head into a little bit of a better position to allow Denki better access.
"There you go, baby," Denki croons, palms bracing on Katsuki's thighs. Very little persuasion gets him up atop the sink, much to Denki's utter delight, and he fits himself perfectly into the slot between Katsuki's legs and resumes this delightful little lesson he was very much enjoying now that his pupil seemed a little more keen on learning.
It's what he'd always figured kissing Katsuki would be like. Maybe it was a little rude of him to assume Mr. I'm-damn-good-at-everything was a hotshot smoocher right off the bat, but hell if Denki didn't love this even more.
"This is like meeting you all over again," Denki says into Katsuki's open mouth, and his eyes flutter shut when Denki's hands come up to cup either side of his stupid, gorgeously dumb boyfriend's face and cradle it as he sucked on his chapped bottom lip. "Cut off and kinda stoney, but you're so soft with a little prodding."
"Ugh," Katsuki manages between huffs, between the meeting and parting of their mouths, "please don't ruin the moment."
"I'm serious!" He takes a moment to pepper kisses up along his cheek and back on down his jaw, where Katsuki grows impatient and meets him halfway.
Now he's certainly gotten a hold of things, or maybe even a bit of a grasp when Katsuki slowly starts to try and follow Denki's example, lips roving experimentally and his tongue cautiously slipping along his lower lip in turn. Denki encourages him in the way he threads his hands through soft spikes, whispers and coos when Katsuki draws back to contemplate before he dove on back in for more.
Very much smug, Denki asks, "so do you think you got the hang of it, big guy? Or is it too much technique for you?"
Katsuki scrunched up his face, mouth twisted in annoyance, but he says, "I can get the hang of it."
"Oh, I bet you can."
Denki startles in Katsuki's arms as a knock sounds at the door, but all it takes is for his lover to roar a very stern fuck off, it's occupied! before he pulls a laughing Denki right on back into his arms, eager for more lessons.
Internally, Denki gives himself a pat on the back for being a damn good tutor.
Maybe he should take the lead more often.