
Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/13303026.
  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:
      Aizawa_Shouta_|_Eraserhead/Midoriya_Izuku
  Character:
      Aizawa_Shouta_|_Eraserhead, Midoriya_Izuku, Yagi_Toshinori_|_All_Might
  Additional Tags:
      Jealousy, dub_con, Mildly_Dubious_Consent, Teacher-Student_Relationship,
      Riding, Aizawa_doesn't_know_about_OFA
  Collections:
      My_Kink_Academia
  Stats:
      Published: 2018-01-07 Words: 1616
****** Playing Favorites ******
by Darbinator1101
Summary
     Prompt: Aizawa finds himself reluctantly favoring problem child
     Midoriya, but gets jealous over the admiration Midoriya has for All
     Might. Obviously, having sex is the only way to cement himself as
     Midoriya's favorite hero.
Notes
     If you don't know what a wooden dummy is here: https://
     www.youtube.com/watch?v=0h5FAPJa5x8
Aizawa opened the door to the teachers' office and was met with, not for the
first time, the sight of Midoriya sitting with Toshinori on the couch talking
excitedly about something. Midoriya looked over and gave him a friendly wave,
and Aizawa just... couldn't. 

He didn't know when it started. He never cared much for All Might, even after
getting to know him better as coworkers, but what had he done for Midoriya?
Sure they had similar quirks and Toshinori gave the boy plenty of attention,
but who stopped him from nearly killing himself with his quirk at the
beginning? Who kept him from getting in trouble with the law? Who was there
first to protect him all the times the villains attacked them? Who was his main
teacher? Was he even training Izuku? 

He shut the door and walked away, gritting his teeth. He tried to tell himself
it was just hero worship, and that Midoriya didn't really mean anything more
than that. He knew it wasn't even any of his business what those two did. He
shouldn't feel this way about a student, but there was something about Midoriya
that held his attention over time. 

Instead of heading home like he had planned he made his way to one of U.A.'s
many gyms to burn off some of this steam. It was empty by this time, most
students having headed home by now. Honestly it also irked him that Midoriya
would stay so late with Toshinori. 

He approached one of the wooden dummies and tied his hair back, setting his
scarf and things aside. He took a deep breath before getting started
practicing. 

"Aizawa-sensei?"

Aizawa kicked the dummy harder than he intended to at the sound of his name and
heard a crack of the wood breaking where he hit. He didn't even need to look to
see who it was.

"Midoriya, whatever it is it can wait until tomorrow." He sighed as he looked
at the crack; it wasn't bad and these saw heavy use so he really shouldn't be
surprised. 
"I heard you in here- You seemed really upset back there." He didn't know why
he expected that to actually get Midoriya to leave. 

Aizawa stood back up and resumed his training saying, "It's none of your
concern."

"But it is- You weren't upset until you saw me with All Might-sensei. And you
were looking at me." Shit had he been that obvious?

Aizawa stopped and finally looked at Midoriya, his student looking like he had
done something wrong, but determined to find out what it was. 

"Midoriya-" Aizawa hesitated before deciding on, "You know how I feel about him
and if you aren't going to leave then you can at least spar with me."

Midoriya didn't look convinced, and headed into the locker room. Aizawa let out
a groan because honestly why did he even offer? He wasn't in a mood to go easy
and so he pulled out some of the mats and took off his boots.

Midoriya returned wearing his gym uniform, also removing his shoes before
walking onto the mats. Aizawa didn't wait until he was ready, surprising him by
dropping low and knocking his feet out from under him. Midoriya fell onto his
ass and Aizawa just looked down at him, having returned to a standing
position. 

Within the next five minutes Midoriya had been thrown to the mat three more
times. He tried to use his quirk once, which Aizawa quickly stopped with
erasure. 

"Is he even teaching you anything?" Aizawa bit out, frustrated. He didn't
expect Midoriya to be on his level, but he expected he would be able to hold
out better than this.

Midoriya got back on his feet, about to give an answer to the question, but
Aizawa moved to knock him down again. Midoriya dodged and tried to duck and
throw a punch, only to have his arm caught and be forced into a hold. Aizawa
held his arm behind him and forced him to his knees face down into the mat with
enough force that it hurt. 

"What makes him your favorite still?" Aizawa knew he was being irrational, and
that he shouldn't even be saying these out loud to Midoriya, but he couldn't
help it. 

He let Midoriya go and sat back on the mat. Midoriya rolled over and sat down,
rubbing at his arm. He hadn't intended to hurt Midoriya and some of the fight
drained out of him at seeing how rough he was being. He put his head in his
hands starting to feel tired.

It seemed Midoriya had learned something though, seeing as he took the opening.
He grabbed both Aizawa's wrists and kicked him to the floor, putting weight on
his chest to pin him. Aizawa didn't struggle and let him have this one. 

"Your jealous." Midoriya stated with mild disbelief as he kept him pinned.
Aizawa just looked to the side.

"Why?" Midoriya asked, loosening his grip but still keeping his weight on
Aizawa. Aizawa glanced back up at him, seeing genuine confusion and curiosity.
He sighed. He knew what he wanted to say, what he wanted to do, and this was
possibly going to be one of the worst decisions he had ever made but he didn't
think he could keep doing this any longer. 

He pulled his arms out from Midoriya holding them and Midoriya shifted off of
him. Aizawa reached up and put a hand on the back of Midoriya's neck, pulling
him down suddenly into a kiss. Midoriya let out a noise of surprise. 

Aizawa pulled Midoriya more fully on top of him, not breaking the kiss. When he
finally let go the boy was bright red and breathed out an "Oh," in
understanding. Still, he didn't make any attempt to leave and kept looking down
awkwardly.

Aizawa rolled them over so he was on top and looked down at Midoriya, sweaty
from their sparring and flushed red in embarrassment. He lowered himself to his
elbows, fully against Midoriya but not putting his full weight on him and
captured his lips again, this time nipping at them and slipping his tongue in
when he gasped. Midoriya let out a moan that went straight to his crotch and
started pulling at his hair, pulling out the hair tie and letting it fall
around his face. 

"I bet he wouldn't do this with you, would he Izuku?" Aizawa said lowly against
Izuku's lips, pulling himself up on his knees again and reaching between them
to squeeze at Izuku's cock. Izuku bucked up against his hand, hard already from
the kissing and from being worked up sparring, shaking his head no. Aizawa
pulled down his pants enough to free him, and started stroking it. 

"Aizawa-" He was cut off by another kiss. 

"Just call me Shouta." He didn't want to be his teacher right now. 

"S-shouta..." Izuku tried out, giving a giddy smile at how it sounded. 

Shouta stopped stroking Izuku and slid down between his legs, laying down and
taking him into his mouth. Izuku practically cried out, tangling his hands in
Shouta's hair. It wasn't long at all before he was cumming in his mouth without
much warning, though Shouta didn't mind, swallowing it easily. 

Shouta sat up and wiped at his mouth as Izuku lay panting. He wanted to fuck
him so badly, but he also was wary of hurting him considering they didn't have
any lube and he wasn't sure if Izuku had ever done this before. However, he had
and he knew his own limits. 

Shouta stripped off his jumpsuit, Izuku sitting up slightly and watching with
wide eyes. He discarded his undershirt and took off his underwear, which had
Izuku turning red again but he didn't look away.

Shouta put two of his fingers in his own mouth and coated them, reaching back
to finger himself after doing so. Izuku's dick twitched in interest again and
Shouta smirked. He focused on prepping himself as Izuku watched, speechless and
unsure what he should be doing. 

Izuku was hard again by the time he felt he was ready, and he was already
dripping pre-cum himself. He wiped some of it and used it to help slick up
Izuku's cock, then crawling over him to line himself up. 

He let out a breathy moan as he slowly lowered himself and Izuku fell back flat
onto the mat. Once he was fully seated, he grabbed Izuku's chin and guided him
to look up at him.

"Who's your favorite now, Izuku?" He rocked on Izuku's cock.

"S-Shouta." Izuku moaned, grabbing at his hips. Shouta lifted up and pushed
down quickly, Izuku moaning. 

He kept adjusting his angle until he got it just right, arching his back and
moaning as he hit his prostate. 

"Fuck, Izuku." He said, bouncing and continuing to keep at that same angle,
picking up the pace. 

Izuku moved one of his hands and started stroking at Shouta's cock, doing his
best to match the pace. Shouta bounced a few more times before lifting himself
up so Izuku's cock was almost out of him, slamming down on it and cumming as
Izuku stroked him. Izuku came with a cry just after at seeing him cum. 

Shouta pulled himself off, cum dribbling down out of him. Izuku sat up and
kissed Shouta, pressing against him and smearing some of Shouta's cum from his
jacket onto his chest. He frowned slightly when Izuku pulled away. 

"Why don't we go shower. I'll clean up the mat later and take your jacket." 

Izuku gave an embarrassed laugh and nodded. 

"Can I wash your hair?" 

Shouta huffed but smiled saying, "Sure."
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