Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/12227298.
  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:
      Mineta_Minoru/Shouji_Mezou
  Character:
      Mineta_Minoru, Shouji_Mezou
  Additional Tags:
      Kinktober, PWP, Size_Difference, Anal_Sex, Oral_Sex, Loss_of_Virginity,
      shoji's_quirk_being_used_exactly_as_one_might_expect_in_a_story_of_this
      nature, mineta_being_himself
  Series:
      Part 6 of Kinktober_2k17
  Collections:
      Kinktober_2017
  Stats:
      Published: 2017-10-06 Words: 1624
****** the bigger they are ******
by WattStalf
Summary
     Minoru and Mezo's first time.
Their relationship takes off slowly, both uncertain for many reasons, both with
their own insecurities to deal with. Minoru can still barely accept the fact
that, in the end, the first person he’s ever felt anything substantial for and
the first person to feel anything for him is another guy, and Mezo is still
getting used to the fact that he’s able to be in such a relationship, and that
there’s someone who likes him in that way at all.
Intimacy is, of course, something that takes them quite a while to get around
to.
In fact, Minoru isn’t sure if he’ll ever be ready to face something like that
at first, because doing anything with Mezo besides their awkward dates would
make all of this real. He’s never been with  anyone  like that, and whenever
he’s imagine it, it’s always been soft, feminine touches, and he’s not even
sure what he’s supposed to  do  with another guy.
But the first time Mezo lets his guard enough around him to show his face-and
Minoru proclaims, “You’re just so  cool  looking, seriously!”- the two of them
kiss for the first time, and that starts off a chain reaction. Even if Minoru
doesn’t know everything that he’s supposed to do with a guy, this is simple
enough and something he can understand, and he suddenly, truly  gets  what
everyone is always on about, and, despite his uncertainties, he wants more.
After all this time, longing for physical contact, now that he has it, it
doesn’t really matter that it’s not with a girl- and in the back of his mind,
he knows that the fact that it’s with Mezo is part of what makes it special- he
still  needs  more. They go from keeping a safe distance even when they’re
alone together to looking for whatever excuses they can find to touch in some
way, though both of them try to be subtle about it when they can.
It’s only a matter of time before things go further, and before Minoru even
knows what they’re doing, they’re both out of their clothes, and it becomes
very clear what’s going to happen.
“I-I’ve never, I mean...you know I don’t…”
“I know,” Mezo mumbles. “Me neither.”
“So, uh, I at least know...you know? Which one of us is gonna…” Putting this
into words is just about as difficult as Minoru would have expected.
“I think that’s pretty obvious,” says Mezo, and suddenly, Minoru is incredibly
aware of how exposed he is, and feels very, very inadequate.
“Well, you know, it’s not all about-”
“That’s not what I meant,” he quickly interrupts. “It’s just a height thing.”
“Oh. Well, still...I mean, I just don’t know...I’ve never done that, and you’ve
never done that, so what if, you know, we do something wrong?”
“Listen, I’m not an expert,” says Mezo, looking away as he speaks, “but I’m not
completely in the dark. We just have to...you know, get you ready first.”
Minoru just does his best not to panic, and Mezo goes to dig out something for
them to use as lubricant. It’s not like he doesn’t  want  this- he wants it a
hell of a lot more than he thought he did, and he wants it more than he’d ever
admit. Not to mention the fact that someone wants him back, that someone like
Mezo  does, someone tall and cool and muscular, and he normally doesn’t allow
himself to mentally gush about his boyfriend, but he  is  his boyfriend, so
maybe Minoru needs to get his shit together a little more on that front.
“Fingers first, I guess,” he says, and, as if it’s the easiest thing in the
world, scoops Minoru up without warning and sits on the edge of his bed. Yes,
the height difference certainly makes things weird, and he wonders how much it
throws Mezo that he’s about to fuck someone he can basically hold like a baby.
“So, do you just want me to, um...sit here?” Minoru asks.
“Yeah, don’t worry about it for now. Just let me handle it.” He gets the
fingers of one of his hands slick, and Minoru closes his eyes and holds his
breath. “Relax,” Mezo murmurs, and he tries to breathe a bit more steadily as
the first finger is slowly pressed inside of him.
Minoru doesn’t know what to make of the new sensation, but he has to let go of
all of his hangups regarding enjoying something like this. Mezo really has to
take his time, but Minoru can’t deny that this is more pleasant than he
expected. A little weird, but pleasant nonetheless, and he whimpers softly.
“Does it hurt?” asks Mezo. “You’re pretty tight, so…”
“N-no, it doesn’t…”
“Still, I don’t know how I’m going to be able to fit much more...we might have
to stick with this for a while.”
This is all already moving so quickly for him that Minoru thinks it might not
be such a bad idea to slow down for the time being, but at the same time, he
feels bad knowing that Mezo isn’t really getting anything out of fingering him.
He can barely speak clearly at this point, but he manages to get out, “What
about...you know, what about you?”
There is a pause before Mezo says, “Well, would you want to try something...a
little weird?”
As soon as he thinks about Minoru is pretty sure that he knows exactly what
he’s talking about, but he only says, “I-isn’t all of this a little weird?”
“You know what I mean.”
He pauses to think about it, but there’s really nothing to think about and he
knows it. “...yeah, w-we...we can try that…”
Mezo nods, pulling his finger out, and before Minoru’s eyes, on the end of
another arm, an entirely new appendage grows. Though it’s not much bigger than
Mezo’s finger, there’s no mistaking it for what it is- but perhaps Minoru is
just more familiar with things of that size than he likes to admit.
Once he’s applied sufficient lubricant, he presses the tip of his newly formed
cock against Minoru, who tries to steady himself by speaking. “D-do you, you
know...you know,  feel  it?”
“Everything feels just the same,” he replies. “Are you sure you’re ready?”
Minoru nods, closing his eyes again, and Mezo pushes inside of him, taking more
time than he did with his finger. His breathing becomes more and more ragged,
but Minoru can barely think straight as he adjusts to the slight pressure and
the growing fullness. It takes quite some time for Mezo to fully fit inside of
him, but once he has, they both take some time to catch their breath before he
starts to move.
After years of building up expectations for his first time in his head, and
years of telling himself that something like this would be awful, unthinkable,
it is impossible for him to wrap his head around this experience, and he can
only lose himself in it. It feels  good , if a little awkward, and there is
only a little bit of pain and that pain is, for the most part, outweighed by
pleasure.
He jumps when he feels something warm and wet touching the tip of his cock, and
he opens his eyes to see a mouth at the tip of one of Mezo’s arms, the tongue
extended slightly, licking him.
“Is that okay?” he asks softly, and Minoru lets out the most pathetic moan in
response. “I’ll take that as a yes.”
“Yeah,” he whimpers, because he can’t say anything else. This too feels weird,
but absolutely  amazing , and when he wraps the lips around his cock, taking it
further in, he feels like he could absolutely  die , in the best way possible.
Quickly, too quickly, he’s crying out again and again and he can’t contain
himself anymore, or hold back a second longer. He doesn’t even think to warn
Mezo, or consider how it will be with a mouth like that, before he’s spilling
inside of it.
“I-I-I’m sorry!” he cries, before going limp as bliss washes over him, and he’s
glad that Mezo is still holding him tight as he fucks him, and the mouth spits
everything out unceremoniously. Minoru tries to catch is breath as he relaxes
into his afterglow, and it isn’t long later that he hears a soft groan, and
then a warmth spreading underneath of him as Mezo comes.
He’s barely even coherent at this point, but Minoru thinks about how weird it
is that, even though he was fucking him with one of his arms, it’s his actual
cock that ejaculates, but then again, he’s never quite understood the specifics
of Mezo’s unique biology, and it doesn’t really surprise him. Once he’s done
thinking about  that , it sinks in that they’ve really just done this, and that
he’s finally rid himself of his virginity, and he’s so overjoyed as he lets
that thought take over that he really doesn’t even care that it was with a guy.
Then again, in the back of his mind, he hasn’t cared about that for a long
time. His ingrained reactions and his fear of his own feelings win out from
time to time, but ultimately, he does care about Mezo, and the two of them are
dating, and he wouldn’t have it any other way.
There is a long silence before they come apart, and as Mezo is setting Minoru
on his bed to let him lay down, he looks up and asks, “So...like...have you
ever used one of those mouths to...you know?”
“You really never change, do you?” asks Mezo with a sigh.
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