Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/13976157.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      僕のヒーローアカデミア_|_Boku_no_Hero_Academia_|_My_Hero_Academia
  Relationship:
      Bakugou_Katsuki/Midoriya_Izuku
  Character:
      Bakugou_Katsuki, Midoriya_Izuku
  Additional Tags:
      blowjob, Anal_Fingering, Explicit_Sexual_Content, sexual_favors, Tagged
      underage_because_they're_teenagers_and_the_whole_fic_is_about_a_blowjob
  Stats:
      Published: 2018-03-15 Words: 1847
****** A Rare Exchange ******
by aideyn
Summary
     "Oi Deku! Heard you're looking for some "Rare Might"~?"
Notes
     A fic entirely inspired by these two pieces of art by the talented
     SybLaTortue~!
      
     Part_1
     Part_2_(NSFW)
      
     Apologies for anything that sounds clumsy or stilted, this is my
     first foray into writing smut.
     It's trashy, indulgent and probably OOC haha-- but I still hope you
     enjoy!
Katsuki hadn’t thought this was how his night would go… The urge to roll his
head back on his neck and moan was strong but he kept still, holding his phone
where Izuku could see.
 
Definitely not what he had expected when he’d foregone his routine of tuning in
early on a whim. A stupid whim, even.
 
He’d overheard Deku muttering about All Might in armor. A collection of images
he didn’t know he had over on the obsessive nerd. Katsuki might not be as
blatant or as hero-worship-y as Izuku about it, but he had been an All Might
fan just as long. He’d found the photos in middle school even. Not that it
would have made any difference if he had known that Deku hadn’t seen them. He
wouldn’t have shared back then.
 
Part of him had almost not shared now. But finding the same album of images had
taken a little bit of time. And by then the common room had been empty of
everyone except for him and Deku. So he had turned to look over his shoulder
with a smirk and a teasing; “Oi Deku! Heard you’re looking for some “Rare
Might”?”
 
The nerd had jumpedhim, though he had easily pulled the phone up and over his
head, out of Izuku’s reach.
 
He hadn’t been serious-- he didn’t have what most people would call a stellar
impulse control, so he had made the joke about a little quid pro quo-- some tit
for tat if you will. The nerd’s face had lit up pinker than Black Eye’s.
Katsuki had thought Izuku’s quick glance around the common room had been one of
embarrassment at first. Like the explosive blonde would have said that shit in
front of any of their classmates.
 
So he had been wholly unprepared for the scarred hands that dove straight for
his belt. The nerd didn’t even finish crawling all the way over the couch. He
had recoiled, shocked, and Izuku’s face then went from pink to red, as though
he just then realized that Katsuki had to have been joking.
 
Deku’s hands faltered at blonde’s zipper. Neither of them had hardly dared to
breathe until Katsuki reached a callous hand into the other boy’s unruly curls,
pushing him down and closer to what he’d started.
 
So now, here he was. Trying not to let his head roll back on his neck, trying
to keep his eyes open. Torn between the hot, wet, blissful feeling of Izuku’s
mouth as it descended on the length of his cock and the spine tingling anxiety
of being unable to stop thinking about how they were literally sitting in the
common room.
 
If anything his cock felt harder at the thought. That was probably something to
examine about himself, later though, when he wasn’t trying to hold himself back
from pushing down on the back of Deku’s head.
Izuku’s tongue swirled around his cock, so fluttery and delicious feeling that
he couldn’t help himself. He pushed down, hips twitching up at the same time.
As wonderful as the back of Deku’s throat felt, he pulled him back up and off
quickly at the sound of the other teen’s hoarse and panicked choking. Wet green
eyes, narrowed with reproach met his own.
 
He didn’t say sorry, wouldn’t and hadn’t. But he clicked to enlarge one of the
better pictures of the backpack-like apparatus from the gallery of images that
had started this whole… situation. Izuku’s eyes darted back to the phone, only
pausing for a brief moment to catch his breath before resuming with a lot more
fervor.
 
Katsuki tightened his fist in Izuku’s hair before releasing the hold, sliding
the hand up and down the other teen’s back. He couldn’t keep his hand in
Izuku’s hair, or he’d risk a repeat of what had just happened. No matter the
new muscles and calluses Deku had acquired over his hands and arms, his back
was still nice and smooth under the rough pads of Katsuki’s fingers.
 
His eyes trailed up from the wet skin of his cock to Izuku’s stretched lips,
flexing his hips in an effort not to buck them up and into the nerd’s hot
mouth. His hand stilled in the middle of Izuku’s exposed back as he found his
eyes drawn inevitably upward to the other boy’s face.
 
Izuku’s eyes were open and bright, focused. Way too focused on Katsuki’s phone.
 
How dare the nerd be so put together in a moment like this. So put together and
so… good. How was the nerd so good at this? The blonde let his eyes flutter
closed for a moment, soaking in the drag of Izuku’s tongue along the length of
his cock, the pressure and sensation of calloused, scared fingers tightening
around the base of him. He had gone for it without hardly a blink. Just one
quick check around the room...
 
Katsuki’s hand settled in the waistband of Izuku’s shorts, pulling them down
roughly till they rested at the tops of the other teen’s thighs. He’d make
those green eyes lose their focus.
 
Izuku didn’t look like he was paying much attention to what Katsuki was doing,
though he did wiggle his hips to get the shorts settled in a comfortable spot.
The blonde tapped another photo, this one a close up of some leg armor, just to
be sure he had some time to do what he wanted.
 
He pulled his fingers out from Izuku’s waistband, bringing them up to his mouth
thoroughly wetting them with his tongue. Satisfied they were soaked, he
replaced his hand back on Deku’s ass, using his one free hand to spread him
wide.
 
Realization hit the nerd’s eyes then. He could see it in the slight loss of
focus, and even if he hadn’t, Katsuki could feel the muscles under the green-
haired teen’s ass tense. Good, that focus was cracked now. Would continue to be
chipped away at, if Katsuki had his way. That would teach the nerd to be so
good at this, teach him to somehow be almost composed about this whole affair.
 
It was hard to do one handed, but Katsuki ran his drenched finger in small
circles around the pucker of Deku’s hole. His grin was almost wolfish as he
watched the nerd’s eyes start to dart between his phone screen and his face. He
waited until they were locked in eye contact before he started pushing one
finger in. Deku’s eyes went half lidded and he sucked in so hard that his
cheeks hallowed around the cock in his mouth.
 
Katsuki had a brief, way too brief, moment of intense satisfaction. That was
much better-- seeing Izuku as wrecked by this as he was. But it was cut short
by the tight grip he had keep on himself to focus on keeping his cock from
exploding. The nerd’s mouth felt like a goddamn silk-lined vice.
 
As if in retribution for his close call with cumming, Katsuki started rotating
his finger firmly, spinning small then larger circles into Izuku’s trembling
body. He watched with heavy-lidded eyes as the nerd tried to keep his eyes
open, losing focus but still desperate for the photos from the album he had
never seen before. It only made sense, since they were the entire reason he had
even thought about doing this-- right?
 
Katsuki licked his lower lip, opening a new photo before he slid his second
spit-soaked finger into Izuku’s ass. It was borderline cruel, but he enjoyed
watching the fight for attention in Izuku’s eyes. He began to move his fingers
faster, alternating between scissoring them and keeping them together to spin
in small circles.
 
Red eyes met green ones before he realized something was different about the
look in them now. The fight in them had intensified.
 
A corner of his mouth twitched up, ready to snarl, to snap or say something. To
ask the nerd what the fuck that expression was for, but before he could do more
than inhale, Izuku pressed down deeper than he had done before, almost as deep
as when Katsuki had thrust into his throat, and swallowed. The blonde’s head
rolled backwards of its own volition, his fingers freezing in place as his hips
jerked upwards sharply.
 
The flutter of Izuku’s throat around his cock was sinful and heavenly at the
same time. Through the haze of being so close to the edge, he realized that he
hadn’t choked Izuku when his hips had thrust up so quickly. One red eye blinked
open blearily and he realized immediately why that was. Deku had held his hips
in place with scared hands that looked tinged with green lightning.
 
“Fuck.” The moan was too loud, despite that it had to fight to escape between
clenched teeth. His hips rolled upwards again and again, trying to chase that
depth, the fluttery tight feeling of Izuku’s throat closing around his cock.
But he was locked in place by firm, calloused hands. His moans felt loud, too
loud. He needed to be quiet, they were in the common roomfor christ’s sake. He
tossed his head to the side, trying to tuck his mouth against his shoulder, but
instead of shoulder his mouth met Izuku’s hip-bone.
 
When he opened his eyes, they were met with the perfect curve of Deku’s ass.
Well… it was much better than a gag. He grinned wolfishly, licking his lips and
leaning forward to bite it.
 
He wasn’t prepared for a lot of things tonight. But most of all, it seemed, he
was unprepared for the sultry, breathy moan that escaped Izuku at the feel of
Katsuki’s teeth sinking into his skin. Nor was he prepared for the unique
vibration that moan made Deku’s throat tremble around his cock.
 
He didn’t even have a chance to warn Izuku before he came deeply into his
mouth. Not that he was sure he would’ve. Though maybe he would have, who knows.
It didn’t seem like too much of a surprise to Deku though, he swallowed wetly
again before his mouth slid off of Katsuki’s cock with an obscenely sloppy pop.
 
They stayed there for a moment, breathing harshly. It took Katsuki a moment to
realize that Izuku was moving in a more deliberate way than just adjusting
himself.
 
“What are you-- give me back my phone!”
 
“Of course Kacchan.”
 
Katsuki quickly checked the open application, expression agog. The nerd had
emailed himself the entire album. That little...
 
They stared at each other, silence stretching into something awkward very
quickly as they both adjusted themselves back to states of dress that were more
appropriate for being in… public.
 
“G-goodnight Kacchan!”
 
Izuku fled, not bothering to wait for the elevator, opting instead to take the
stairs.
 
Katsuki leaned his head back against the couch, blinking almost owlishly as his
mind tried to process the events of the last half hour.
 
This… definitely hadn’t been how he thought his night would go.
 
But he’d be lying if he said it wasn’t a damn good way to spend an evening.

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