Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/12406905.
  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/Bakugou_Katsuki
  Character:
      Aizawa_Shouta_|_Eraserhead, Bakugou_Katsuki, Class_1-A_(My_Hero_Academia)
  Additional Tags:
      Corporal_Punishment, Spanking, Kink_Discovery, Masturbation, Bakugou
      Katsuki_Swears_A_Lot, Public_Humiliation
  Series:
      Part 1 of Never_Bakugo's_Fault
  Stats:
      Published: 2017-10-19 Chapters: 2/2 Words: 1510
****** Not my fault ******
by Darbinator1101
Summary
     Chapter 1 is the actual spanking so not really anything explicit
     (unless you count swearing) until chapter 2
     Takes place prior to final exams arc.
***** Chapter 1 *****
Enough was enough.
Aizawa activated his quirk and captured a blond, no longer exploding, would be
hero currently having what he considered to be a temper tantrum. 
"Bakugo I'm not going to tolerate any more of this behavior." Aizawa looked
intensely at his student and yanked him closer so he had no excuse for not
hearing. 
Bakugo glared back, "If fucking Deku had just stayed out of my way-"
"You two are supposed to be learning to fight together."  Aizawa closed his
eyes and pinched the bridge of his nose. He heard a few explosions fire but he
hadn't been so careless as to not make sure Bakugo's hands were pointed in a
safe direction when he captured him. Thankfully he had just had them put on
their gym uniforms instead of their costumes for this training.
"Shitty Deku should have just done what I said then instead of refusing!"
Bakugo fumed.
"And you both would have lost faster," Aizawa glared back now, "Not to mention
the danger you would have been putting him in had this been a real fight and
not just sparring with your classmates."
"Fuck off. It's not my fault if Deku can't keep up." Of course it wasn't.
Nothing could ever be Bakugo Katsuki's fault. What childish reasoning. 
Aizawa didn't respond, taking a calming breath and trying to decide how to
proceed when talking wasn't getting him anywhere. He studied Bakugo carefully
when an idea came to mind and he smirked. If this brat was going to act like a
child then he would treat him like a child. 
Without warning, Aizawa sat down on the grass, forcing Bakugo down with him. He
yanked on his capture gear and maneuvered his student until he was laying face
down on Aizawa's lap. 
"WHAT THE FUCK-" Bakugo choked on his words when Aizawa pulled down the back of
his gym pants and boxers to expose his ass. 
"Children who won't listen get punished." He stated simply as if it was
obvious. He was aware that he had the attention of the rest of his class at
this point and grinned. Let them watch, he was well within his rights as a U.A.
teacher to punish his student as he saw fit. 
Aizawa gave a smack, mocking Bakugo by only hitting as hard as he would if he
were spanking an actual child.
Bakugo's face went bright red in both anger and embarrassment, "YOU'RE FUCKING
SPANKING ME!?"
Aizawa hummed in agreement and gave another controlled hit in the same spot,
"How many do you think you should get?" He already had a number in mind and
normally wouldn't have bothered even asking, but it was good for children to be
allowed a say in what they think is fair punishment.
Bakugo sputtered before responding, "FUCKING NONE! YOU CAN'T-"
Aizawa brought his hand down- hard this time. He had no doubt the whole class
had heard the slap. 
"I can and I am," Aizawa said sternly, "Fifteen then, since that's how old you
should be acting." He would even be nice and count those three he already
gave. 
He felt the way Bakugo tensed on his lap, but his student didn't seem to have a
response.
Aizawa didn't give him time to come up with one before he hit Bakugo's other
cheek just as hard. The boy grunted in pain and grit his teeth.
Five, six, and seven were given in rapid succession on one side, Aizawa making
sure it would sting. He did the same to the other side making ten. 
At this point Bakugo got a small break while Aizawa shook out his hand. He
couldn't see Bakugo's expression anymore as the boy had turned his head away,
but he could feel him shaking slightly. 
"Five more." Aizawa told him. He didn't know if Bakugo was counting; He
supposed he could have made him count aloud but he was already doing this in
front of the class as is. 
The next hit wasn't as hard as he had been since his hand was hurting and he
doubted it mattered at this point since Bakugo should feel the sting worse
thanks to the previous hits; His ass was a pretty impressive shade of red. His
sharp inhale seemed to confirm this.
He did it again and Bakugo let out a stifled sound before going rigid. Aizawa
hesitated and looked his student over, making sure something else wasn't wrong.
Bakugo still refused to let him see his face. 
Not finding anything, he continued with two more hits, one on each side. Bakugo
gasped and was breathing hard now. 
Aizawa made the last one hard again, and Bakugo did a poor job at biting back a
moan, effectively stopping everything his teacher had been about to say. 
Aizawa cursed under his breath and screwed his eyes shut, hoping it wasn't as
bad as it could be and none of the other students had heard that. 
He opened his eyes again and addressed the rest of the students, "Show's over,
get back to sparring." Thankfully they scattered quickly, with the exception of
Midoriya, who looked very concerned and guilty. A pointed glare took care of
that easily enough.
Aizawa pulled up Bakugo's pants and sat him up carefully off of his lap. He
couldn't help noticing the tent the boy was sporting as he unwound his capture
gear. To his credit, Bakugo looked mortified, on the verge of tears,
and covered himself at the first opportunity.
"I'm not going to tell anyone," Aizawa sighed, "and you should know that it
isn't anything to be ashamed of liking." Whether it was the spanking, being
tied up, or just the loss of control, Aizawa didn't need to know. "You're
dismissed from the rest of class. Go do whatever you need to do."
And on that note, Aizawa stood and walked away to watch some of his other
students sparring. Bakugo waited until after he was some distance away to
stand, shoving his hands in his pockets in an attempt to hide his boner as he
made his way to the locker room. 
***** Chapter 2 *****
Bakugo was glad the locker room was empty considering what might've happened if
he ran into anyone else right now. He angrily grabbed his shower things from
his locker and claimed the stall at the far end in the corner. 
Fuck Aizawa hadn't gone easy on him; His ass was still throbbing as he stripped
and turned on the shower to cold. He let out a breath of relief as the cold
water soothed the pain. He glared down at his other problem and punched the
wall.
Why the fuck had his teacher spanking him turned him on!? (In front of the
whole class no less, but if he was being truthful Bakugo had forgotten that he
was being watched about halfway through the spanking.)
What Aizawa said to him replayed in his mind, '...it isn't anything to be
ashamed of liking.'
He groaned and leaned back to put himself fully under the spray and let the
water run down his face. He didn't know exactly how much time he had and his
choices were to either try to wait his boner out or just jerk off. 
He gently reached back and touched his ass. It stung a bit and his dick
twitched in interest. Jerking off it was then because it would clearly be
faster. He started to stroke himself lightly. Did Aizawa also get off on being
spanked?
He blushed as the thought occurred to him but ultimately snorted because there
was no way that could be true. The bastard probably got off on doing the
spanking. 
He continued stroking himself and couldn't help it as his thoughts drifted back
to the feeling of Aizawa's hand smacking his ass. He was probably smirking the
entire time. His hand started moving a bit faster. 
He started to imagine if he had started to grind on Aizawa's leg. Aizawa
spanking him for doing it. He wouldn't stop though, he'd simply grind harder
until Aizawa decided he'd been spanked enough. 
Bakugo shoved the hand that hand been groping his own ass into his mouth to
muffle any noises he was making as he started really jerking himself, hand now
slick with precome. 
He imagined Aizawa smirking at him, could hear him telling him '...do whatever
you need to do.' Watching as he jerked himself off...
Bakugo came with a moan and spent a moment catching his breath. His face went
red as it just dawned on him that not only had he jerked off to being
spanked, he just jerked off thinking about his fucking teacher. 
He slammed the water to hot and showered angrily. What the fuck was wrong with
him today? This had to be Aizawa's fucking fault for spanking him in the first
place. This wouldn't have even happened otherwise. 
He got dressed and stormed out, knowing exactly where he was heading. If a
certain shitty yellow sleeping bag got blown up- well that wasn't his fault
either. 
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