Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/12654894.
  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, Midoriya_Izuku_(briefly)
  Additional Tags:
      Mildly_Dubious_Consent, Teacher-Student_Relationship, turned_on_by_the
      idea_of_getting_caught, Bakugou_Katsuki_Swears_A_Lot, Power_Imbalance, in
      bakugo's_favor, stubborn_bakugo, No_penetrative_sex
  Series:
      Part 2 of Never_Bakugo's_Fault
  Stats:
      Published: 2017-11-07 Words: 2593
****** Still your fault ******
by Darbinator1101
Summary
     This takes place following the events of Not my Fault so I suggest
     reading that first or this probably won't make a ton of sense.
     Bakugo can't stop thinking about that bastard and decides to confront
     him in an attempt to make things even. It goes a little farther than
     he intended but he isn't about to complain.
     (Mildly dubious consent on Aizawa's part).
Notes
See the end of the work for notes
It had been nearly a month now and despite all his attempts, Bakugo could not
stop thinking about it. However thinking about his newfound kink wasn't really
the issue- Bakugo could accept he had a thing for being spanked and after doing
some research he found he was far from the only one.
No, his problem was he couldn't stop thinking about who had done it to him. No
matter how much he tried to imagine someone else- Shitty hair, Half 'n Half,
even fucking Deku- it always turned into the same person in the end and he
didn't know why. Why did his shitty bastard of a teacher Aizawa always have to
invade his thoughts!? He had even had a few incidents now where he hadn't even
been thinking about spanking and the bastard still found a way to get involved.
Bakugo had decided he'd had enough of this and ate his lunch extra quickly
today, knowing exactly how he planned to spend the rest of his break.
He slammed the classroom door open and shut again as he entered the seemingly
empty room. However he discovered this was untrue as he walked to look behind
the teacher's desk and found just the person he wanted to see, trying to nap in
a ugly (and probably new considering he didn't see any scorch marks) yellow
sleeping bag on the floor. 
"Oi sleepy bastard!" Bakugo called, standing at the foot of his sleeping bag.
He scowled when Aizawa didn't respond. 
"I know your listening fucker,"  Bakugo continued, earning himself an annoyed
sigh in response. 
"What?" Aizawa asked without even bothering to open his eyes.
"I need you to get out of my fucking head that's what." Bakugo got straight to
the point knowing he had a time limit.
"Am I supposed to know what you mean?" Aizawa opened his eyes and glared back
at Bakugo.
"When you fucking- I can't stop thinking-  It's just always fucking you!"
Bakugo's face started to flush from both embarrassment and frustration. 
Aizawa studied him trying to figure out what the hell Bakugo was referring to. 
Bakugo got more frustrated and impatient so he stepped over Aizawa so he had
one leg on either side of him and yanked him up as much as he could by the
opening of his sleeping bag. 
"When you fucking spanked me!" He yelled in his face. 
Understanding now and as calm as ever, Aizawa responded, "I don't deal with
this kind of stuff. Midnight would be happy to talk to you about it." Midnight
taught all of U.A.'s sex education in addition to her other duties. 
Bakugo ground his teeth angrily and Aizawa was ready to erase his quirk in case
he decided to get explosive. 
"It's not fucking about that! So what if I'm into being spanked I can deal with
that!" Bakugo sat down, not letting go of Aizawa, anger draining out of him as
he continued in a quieter voice, "But why's it always gotta fucking be you?"
Aizawa took the silence that followed as an opportunity to process this new
information, deciding to just ignore the fact that Bakugo was sitting on his
lap for now. So he kept thinking about Aizawa doing the spanking, presumably
when he was trying to masturbate. It sounded like he had tried to think of
other people and couldn't. Aizawa didn't really give a shit if some horny
teenager found him pleasurable to think about and he had gotten looks from
students in the past that he simply ignored. However, this was the first time
he was aware someone found it so distressing and Bakugo was clearly upset by
this. 
He took a breath before asking, "And what do you want me to do about this?"
Bakugo let go of the sleeping bag and crossed his arms, Aizawa staying sitting
up on his own.
"I don't fucking know. I just know this is your fucking fault." Of course it
was. Aizawa knew better than to pursue that train-wreck of a conversation. 
They sat in an awkward silence as Bakugo tried to think of just what exactly he
did want Aizawa to do about this. During this time he realized the position he
had put himself in unintentionally, but didn't move because that would be
admitting to it. 
"Well what about you? Are you into it?" Bakugo finally asked quietly, looking
away as if he didn't actually care whether Aizawa answered or not.
"No." Aizawa answered immediately since that was a fair question, getting
Bakugo's attention, "For me spanking is a punishment and nothing more. What
happened was unintentional."
"Then what kind of shit are you into?" Bakugo asked curiously, shifting to sit
a little more comfortably and trying not to show any signs of embarrassment.
Aizawa raised an eyebrow at him, "Why would I answer that?"
"Because you know one thing I'm fucking into."
"And?"
Bakugo growled, "And so I should get to know one thing you're fucking into." As
if that would somehow make them even.
They stared at each other defiantly until Aizawa said flatly, "I like having
sex."
"No shit! Really?" Bakugo deadpanned. 
"Can I go back to sleep now?"
"I'm not leaving until you tell me."
Which meant Bakugo also wasn't going to let him sleep even if he did try. Fine,
if Bakugo wouldn't leave Aizawa decided he would leave instead and go find
another place to nap. He was done having this conversation. 
 Aizawa unzipped his bag from the inside and let it fall to the ground. He
started to remove himself from it, and by association Bakugo, moving
backwards. 
"No you fucking don't." Bakugo wasn't about to let him leave either. He wanted
a fucking answer. He did the first thing he thought of and grabbed Aizawa by
the collar of his jumpsuit, pulling himself forward and hooking his legs around
his teacher's waist. His face went red when it occurred to him a second too
late that he was now fully in Aizawa's lap without the sleeping bag between
them. However he was stubborn and refused to let go. 
Aizawa was startled by Bakugo's bold move but that quickly turned to a
reprimanding look, his tone icy as he said, "Bakugo let go."
"Or what?" Bakugo challenged, "We both know what this fucking looks like."
Bakugo didn't need to say that anyone who saw them would automatically assume
Aizawa was to blame. It was the nature of him being the teacher and Bakugo
being the student, even if it wasn't true. 
He didn't want to give Bakugo power over him but Aizawa wasn't stupid and knew
protecting himself was more important. Even if he could prove what happened
wasn't his fault, it would still look bad that it even had to be addressed and
he would rather avoid that. He briefly considered just pushing Bakugo off, but
Bakugo could still claim he touched him and he knew it would be a fight, so
instead he deliberately put his hands behind his back so it was clear he wasn't
touching his student. 
Bakugo smirked, knowing he had the upper hand.
"I never told anyone what you did, but I still could you know," Bakugo
threatened, "So why don't you just fucking tell me?"
Aizawa kept his mouth shut in blatant refusal. There was no reason for him to
think Bakugo would actually leave once he told him, now that he had this sort
of power. He knew his student, which also meant he knew Bakugo wouldn't want to
miss his next class. He glanced at the clock. They had roughly twenty minutes
until lunch ended and he had a prep period after so no students should be
coming into the room. He could wait it out.
Bakugo followed his gaze and commented, "If I was late do you think some fucker
would come looking for me?" His eyes flicked back to Aizawa, "I bet they
would."
Aizawa looked at him intently, trying to see if he was bluffing but Bakugo just
had an amused look. 
"Door's unlocked. They could just walk in." Aizawa couldn't help how he glanced
over at the door when Bakugo nodded toward it. 
Bakugo grinned, "Afraid?"
Aizawa kept his expression harsh. He wasn't afraid of someone catching them, he
would deal with the fallout if they did, but that didn't mean he wasn't
affected by the idea at all. 
Bakugo continued taunting, "Wonder what the fuck they'd think. Maybe that you'd
offered me something? Better grades? Connections to pro-heros?"
Aizawa scowled. He would never do anything so underhanded and manipulative to a
student. 
Bakugo lowered his voice and spoke more slowly, "Who do you think would come
looking?"
Aizawa couldn't help how his heart rate picked up at the shift. 
"Speedy? He is the class rep. The innocent fucker would probably die."
He tried to ignore what Bakugo was saying but it was hard not to imagine Iida
catching them. While he wouldn't die, Bakugo was probably right about him being
very embarrassed.
"Could be rich girl. Or maybe shitty hair? He seems to have a strange
attachment to me," Bakugo snorted, "He'd probably say this wasn't manly when he
reports it."
As Aizawa thought about either of the two catching them, an involuntary shiver
ran through him. 
He knew Bakugo had noticed by the brief look of confusion, followed by slow
understanding. 
"I guess you did answer after all." Aizawa hated the dark grin Bakugo was
giving him.
"You fucking like the idea of someone catching us huh?" 
"Yes." Aizawa bit out. "Now will you leave."
"I knew you had to have some fucked up kink too," Bakugo sneered. When would he
ever get another opportunity like this? "I know who's gonna come looking. It's
gonna be fucking Deku cause-"
As if on cue, the door started to open. Aizawa reacted instantly, pulling
Bakugo down and covering his mouth as he laid down to hide behind the desk. He
silenced his breathing.
"Kacchan? Are you in here? It's almost time for class." Midoriya called in as
Bakugo had predicted. They were out of sight from the door and the lights were
off, so when Midoriya didn't get a response and saw no one, he closed the door
again and left. 
Aizawa let go of Bakugo and cursed himself for reacting on instinct. They were
in a worse position now to get caught in and if they were going to get caught
by someone he couldn't have asked for anyone better than Midoriya. 
Bakugo was caught off guard now that he was in a position where he could feel
just how affected his teacher actually was. He propped himself up a bit just so
he wasn't fully laying on him. The thought crossed his mind that perhaps if
they really did do something, he could stop thinking about him. Regardless if
that would work or not, he couldn't deny he wanted to do something as he saw
his teacher look actually embarrassed for the first time. It was hardly what he
had imagined in his fantasies, but damn if it wasn't attractive in its own
way. 
Bakugo made a decision, whispering, "Ever fuck a student before?"
"No!" Aizawa hissed back. 
Bakugo rolled his hips against Aizawa to show he was interested as he offered,
"Want to?"
Aizawa grabbed his hips to stop him from doing it again. 
"Bakugo have you ever even...?"
"Had sex? I'm not a fucking virgin." An advantage to being popular in middle
school.
"Do you understand the consequences if anyone found out?" Aizawa asked,
tightening his grip.
"I'm not gonna fucking tattle. I don't want anyone to know shit either." Bakugo
looked him in the eyes as he spoke. 
Aizawa knew this was wrong and he should refuse Bakugo. But knowing he had
consent to do this despite that was thrilling and he was more worked up after
actually almost getting caught. Bakugo had good reasons not to tell anyone
either and it was true that he never told anyone about the first incident when
he easily could have. 
Besides, he reasoned that he didn't have the supplies to actually fuck Bakugo
anyway so it would really just be both of them getting off. 
"Fine." Aizawa consented, kicking off the rest of the sleeping bag and flipping
their positions so Bakugo was the one laying on it under him. Bakugo let out a
noise of surprise. 
Aizawa sat up and unzipped his jumpsuit, taking it off of his upper half and
pushing it down so Bakugo could see his briefs. 
"This too." Bakugo demanded, tugging at the undershirt Aizawa was wearing. He
had been disappointed when his chest wasn't bare.
Aizawa didn't care enough to argue and stripped off the shirt as well. He
almost tossed it to the side but paused thinking as he saw Bakugo undoing his
own pants and taking his dick out. He looked at his shirt and sighed tossing it
onto Bakugo instead.
"Use it if you don't want your uniform dirty." He would throw it away after
since it wasn't like he didn't have more at home, and it was worth it to not
have to deal with any cleanup. 
Bakugo grunted in acknowledgement, his dick twitching at the idea of getting to
come on something of his teachers. He straightened the shirt out slightly so it
was ready to grab. 
He didn't even try to hide how he watched as Aizawa pushed down his briefs and
took himself out as well.  His teacher wasted no time leaning back over him,
supporting himself with one hand while taking both their dicks in the other. 
"Fuck yes." Bakugo breathed out closing his eyes and beginning to grind against
Aizawa's dick and his hand. They stayed like that, quietly grinding for a while
as Aizawa also worked with his hand, getting slicker as precome started to
dribble out. 
Bakugo opened his eyes to look at where they were rubbing together, then
trailed up to look at tight abs and toned pecs that he had never really thought
about Aizawa having because of how he always wore his baggy jumpsuit. He knew
the guy had to be fit but fuck. Finally he flicked his eyes up to look at his
face, seeing his teacher looking back with an expression he knew he wasn't
going to be able to get out of his head and that he was screwed now. He grabbed
the shirt and came into it, letting out a moan. 
Aizawa had to bite back a moan as well, letting go of Bakugo and focusing on
finishing himself. The moan was just loud enough that someone outside the door
could have heard. 
"Close." He warned, breathing slightly heavier as he jerked himself roughly.
Bakugo grabbed the shirt again and Aizawa came as soon as he felt the fabric
around his dick, letting out a quieter moan than his student did. 
After catching his breath Aizawa sat back up, Bakugo following suit as he set
the soiled shirt aside. They put themselves back together and Aizawa winced
when he saw the time. 
"You should run." If Bakugo hurried he wouldn't be more than ten minutes late. 
"What no cuddles?" Bakugo joked, standing and double checking his uniform. He
made his way to the door, throwing up his middle finger as he said with an
audible smirk, "Fuck you later then."
As soon as the door shut Aizawa fell face first onto the bag. He wasn't sure
anymore whose fault this was.
End Notes
     Tried to keep them as in character as possible and hope I succeeded.
Please drop_by_the_archive_and_comment to let the author know if you enjoyed
their work!