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"Today, i'm gonna show you somethin really cool I found!"
katsuki exclaims as he drags Izuku up to his room. The boys were having a playdate, like any other day. Mitsuki and Inko were both at work, so Masaru was taking care of the kids. By taking care of them, it was meant that he was watching TV while the boys entertained themselves. But Katsuki and Izuku were perfectly capable of doing that, and revelled in each other's company without adult supervision.
"C'mon 'Zuku, you'll really like it!"
Katsuki stresses as they pull up to his desk, sharing a seat at the boy's computer.
"What're you showing me?"
Izuku asks, confused. They rarely spent time on the computer, preferring to play outside or with Katsuki's toys.
"Be patient, nerd"
The blond says, before turning to Izuku.
"'Kay, so I was playing games on this site, alright, and then this ad popped up."
He clicks onto a tab, and Izuku's first thought is 'why are they naked?'. He voices it to katsuki, confused at all the pictures on the screen. Women and men with no clothes on, hugging, kissing - it was strange.
"you'll see!"
Katsuki replies excitedly, clicking on one of the videos. It starts playing, starting with a man and a woman talking. Then they start kissing. Then their clothes start coming off, and they start - wrestling? It makes Izuku feel weird. Like he shouldn't be watching.
"What are they doing? Are they hurting eachother?"
He asks his friend, frowning at the scene.
"No, dummy. It's like hugging. But it feels really good."
He says confidently. The video shifts to the woman bent over the man, kissing down him, and - sucking his privates?
"What? What is she doing?"
The greenette asks, shifting in the seat. Surely it tasted funny-
"Trust me, it feels good" Katsuki reinforces. "I'll show you"
He turns to Izuku, climbing on top of him.
"Kacchan - wait -"
The boy tries, but his friend shuts him up with a glare.
"Just wait, i'll show you. I'll make you feel good, 'Zuku, then you can do it to me"
He promises, before bringing a palm down to Izuku's crotch, gently kneading at the skin. Izuku's cheeks heat slightly as his friend starts touching him.
"feels funny, Kacchan"
He mumbles, squirming slightly as a new feeling starts to slowly build. Katsuki pulls his hand away, instead yanking his shorts and undies down in one motion.
"I'll use my mouth now. if you thought that felt good, just wait"
He says with a grin, licking a stripe down the boy's privates, a small whine coming from Izuku's mouth as his inexperienced boy-cock fully hardens.
"I've been watching the videos, I know what to do. I wanted to make it good for you" Katsuki says with a grin. "I'm the best at everything, i'll be the best at this too"
He finally takes his friend into his mouth, tonguing at the slit while sliding his mouth up and down.
"Kacchan~" The greenette gasps, pleasure spiking through him. "W-Wait, I think - I need"
He tries, before a sudden shockwave of pleasure grips the boy, body shaking as he empties himself in his friend's mouth, the other swallowing it all.
"wha- what was that?"
He asks once he catches his breath, still slightly dizzy.
"That was coming" Katsuki said proudly. "See? I told ya it'd feel good. You were really quick though. they last longer in the videos." He says with a shrug. "guess I was just that great at it. But it's my turn now!"
He says, bring a hand down to palm his already half-hard dick.
"Uhm, I don't think I want to - use my mouth" Izuku says shyly. "It seems sorta gross"
Katsuki rolls his eyes at his friend, before nodding.
"fine, I can hump you instead. they also do it in the videos. all you gotta do is kneel there"
"Oh, that sound fine"
The other agrees, wanting to please his friend after he just made him feel so good.
"you can hump me, then you can come too"
Katsuki then maneuvers the boy off the chair, and to the ground.
"Alright, just kneel there on your hands and knees, and i'll do it from behind"
He says, palming his clothed privates as he speaks. The blond starts rubbing his crotch along Izuku's ass, slotting his small erection against his friend's crease.
"Does it feel good, Kacchan?"
Izuku asks from under him, pushing his hips experimentally back a little.
"mh~ yeah nerd, keep going"
He says, thrusts increasing in speed. Katsuki hunches over his friend, aggressively rutting into his behind, chasing his pleasure.
"S'good - close - m'gonna"
The blond mumbles, eyes squeezing shut as he tips over the edge. he spills in his shorts as he roughly thrusts into Izuku, heightening his orgasm until he finally collapsed next to him.
"Thanks, 'Zuku" He says happily. "We're gonna do this everytime we hang out, alright?"
He says with a grin, turning to his friend.
"yeah! I liked it. it did feel really good" The greenette admits, blush scattering his freckles.
"boys, lunch!"
They hear Masaru call from downstairs, and they head down together, happy and tired.