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“Good morning students.” Aizawa greeted as he walked into homeroom. He narrowed his eyes as he scanned the classroom, settling on an empty desk. Homeroom wasn’t an attendance required class, but such a prestigious school like UA tended to make attendance an unofficial requirement. He needed to announce housekeeping duties and hand back papers at this time.
He made those few announcements, handed back a few papers to the excited “yes! An A!” and groans “Nooo, not the English test already!” murmured between his students. He placed the missing student’s papers facedown on her desk.
Where was Asui, anyway? As it was just homeroom, he couldn’t justifiably raise an alarm until the first period. The other students didn’t seem concerned.
“Do you know where Asui is?” He asked Uraraka. They were close friends, after all.
“Ah, she had a phone call.”
Good enough for him. His students are adults, they can make their own decisions.
A few moments later she walked in through the back door (probably not to disturb anyone, smart girl) and croaked out an apology.
“Sorry Sensei, my sister called me.”
Aizawa nodded, before getting out his sleeping bag and electing to take a 30 minute nap during homeroom- before the excited eruption of questions broke the peaceful study-filled silence of homeroom.
“Oh, my, gosh! You have a sister?” Squealed Asido.
“I have two siblings.” Tsuyu croaked proudly. “My parents are both frogs, so they were able to have three children with little issue.”
“Ahhhh, you’re so lucky, Tsuyu-channnn!” Kanimari groaned. “My mom had four pregnancies before she finally had me and was so fed up with the whole thing that she didn’t want another one.”
“Oh, that poor thing.” Tsuyu croaked sympathetically. “I’m sure she worked very hard.”
“She’s super manly!” Kirishima shouts.
Iida clears his throat. “I have an eldest brother, but my mother had two failed pregnancies between our births. Not nearly as severe as your mothers’, but I can relate.”
“I have a twin sister.” Tokoyami announced.
“Oh wow, really? You should bring her to school sometime, we would love to meet her!” Satou offered.
“Is she identical or fraternal?”
“If it’s his sister then it’s obviously fraternal, dumbass!” Ojiro hit Kaminari over the head with a textbook.
“You never know with twins!”
“You’ve met her several times before,” Tokoyami said. Dark Shadow manifested on his shoulder and waved.
“Ohhhhhhhh,” Kaminari said. “That makes sense actually.”
“That is a lot of miscarriages. Is this something normal?” Todoroki whispered to Midoriya, his go-to for questions relating to social norms.
“Well, yeah,” Midoriya says at a normal volume. “It’s like the opposite of quirk marriages. Our parent’s quirks aren’t always compatible with making children, so there’s a lot of pregnancies that fail. As-Tsuyu having two siblings is really exciting for that reason.”
Now why in the world would Midoriya bring up something as archaic as quirk marriages to the socially inept Todoroki, of all people. Aizawa raised an eyebrow.
“That’s really sad, actually.” Todoroki hums. “I don’t know many details about my own mother’s pregnancies. But I am glad that I have three siblings, even if I wasn’t able to grow up with them.”
“Ehh?! Three?” The whole class turned to Todoroki. Then they erupted into chaos.
“So lucky, Todoroki-kun. I wish I had an older brother or sister.” Complains Mina. “It’s like having a built-in BFF!”
“Really? I always wanted a younger sibling.” Uraraka says. “That way I could teach them things and protect them!”
“You’ll make a great older sister, Ochako-chan!” Hagakure said. “You’re totally the type that would teach them how to tie their shoes and stuff.”
“...Oh my god I just realized how hard it must have been to learn to tie your shoes without visible hands.”
“Hey, Shouji! Do you have any siblings?” Kirishima called from the other side of the room.
“I wasn’t supposed to exist, so no.” Shouji sounded forcibly neutral despite the choice of words.
“So manly!”
“Kirishima, I don’t think you’re using that word correctly.”
“Todoroki, are they older or younger siblings? You seem like the troublesome youngest brother type, they have to be older, right?”
Todoroki shifted in his seat.
“My quirk came in really late. But I was born a month early, so maybe that had something to do with it?” Midoriya rubbed his chin in thought. It seemed to Aizawa that Midoriya was directing the conversation away from Todoroki’s personal life.
For as much of a thickheaded problem child Midoriya can be, he can be surprisingly tactful.
“Eh, that’s strange! What’s your parent’s quirks, Deku?” Uraraka asked.
“Fire breathing and telekinesis.” Midoriya said happily.
“Uhh…”
Everyone looked over at Midoriya in mild confusion. He seemed entirely unbothered by the contradicting information.
“... How the FUCK did you get that crazy monster quirk from that.” Ojiro finally asked.
“No idea!” Midoriya smiled brightly.
(“Should we tell him?” Jirou whispered to Yamomo.)
(“If it hasn't occurred to him then I don’t think so.” She whispered back. “Let’s not mettle in the affairs of our classmate’s parentage.”)
(“Midoriya is very smart,” Tokoyami said to them both. “If it has occurred to him, it could have made him double down in regards to his parentage. I bet it is a sensitive topic. Best tread lightly, least you hurt his feelings.”)
“He’s not the only one with a mutant quirk, my parent’s quirks are ‘gravity increase’ and ‘iron stomach.’” Uraraka says. “Not nearly as exciting as ‘fire-breathing and telekinesis somehow make super-strength’ but still. It’s not completely out of pocket.”
“It’s like you got the exact opposite of their quirks.” Midoriya laughed.
“Seriously! I wish I got the iron stomach aspect at the very least!”
“...So is your dad’s stomach like, literally made of iron or does he just not get nauseous?”
“Hey hey, wanna see my little brother?” Sero says proudly, turning his phone around. A tiny baby nestled in blankets was on the screen. The girls (and Iida) all but swarm him and coo at his baby pictures.
“Oh my godddddd look at how chubby his cheeks are!” Mina squealed.
“Look at his widdle tape dispensers!” Iida cooed.
“Both of your parents are invisible, right Tooru-chan? How many siblings do you have?” Jirou asked.
“Oh, it’s just me~! My parents didn’t want more kids.” Tooru giggled.
“Ah, it must be hard to keep track of an invisible baby.”
“Exactly! I bet they lost track of me so many times when I started to crawl.”
“I don’t even want to think about taking care of a visible baby and all the places they can hide. An invisible child must have been normal parenting on steroids.”
“Bakugou, do you have siblings?”
“Fuck off,” Bakugou exploded.
“Aw look guys, he’s totally jealous that he doesn’t have a handsome baby brother to show off!” Sero teased.
Kanimari giggled. “He is so handsome with his widdle breadstick arms hehehe.”
“He looks just like you! Baby-ata!”
“Isn’t that a thing? Like our quirks are on the mtDNA, so that’s why we all look like our moms, right?” Yamomo said out loud.
Uraraka blinked. “Eh, really? I’ve never thought about it…”
“You are right. Mitochondrial DNA is passed on through the mother and the genes expressed do lie on the mtDNA. But they can be mutated- that’s why we look similar to our moms, but still have a mutated quirk from both parents.” Midoriya explained.
Todoroki hummed. “Ah, now that I think about it, I’ve never heard of someone getting their dad’s quirk with no mutations.”
“It can probably happen if the parents have similar quirks to begin with, but then it just makes it hard to tell if it's the mother’s or the father’s quirk.”
Jirou twirled her jacks around her fingers. “I have my mom’s exact quirk, no mutations. My dad’s quirk is that he can dislocate his joints and reconnect them at will. Like Todoroki said, I’ve never heard of someone just having their parent’s quirk.”
“Hm, that’s the same for me too,” Yaomomo hummed. “I have my mother’s exact quirk. Admittedly I believe I inherited my father’s personality and mindset, however. As much as I love my mother, she never seemed to grasp the fundamentals of chemistry that make up the basis of our quirk. She works entirely on instinct.”
“It’s probably for the best. You’ll be way too OP otherwise.”
“It’s good that you want to be a hero, because you would be an unstoppable force of nature if you did anything else. Like, you can supply nukes to countries at the very least. Or make really good computers and flood the markets with cheap knock-offs.”
“Both of those things are super illegal!”
“You’re too good for this world, Yamomo!”
“Bakugou! Which one of your parents explodes!” Kirishima bravely tackled Bakugou from behind.
“None of your business, shitty-hair.” Somehow, Bakugou did not explode, but he looked pretty done with the conversation regardless, half smashed against his desk by Kirishima’s tackle.
“Kacchan’s mom has chemical sweat and his dad can rapidly oxidize his sweat to make sparks!” Midoriya replied, and got exploded for his troubles.
“DON’T TELL THEM MY LIFE STORY, SHITHEAD!” Bakugou exploded.
“Oh man, I have two moms! And I don’t have either of their quirks! Crap, am I adopted or something?”
“...Kirishima, if you have two moms and don’t look like either one then you probably were.” Jirou said slowly.
“That’s so manly!” Kirishima cried manly tears while aggressively fist-pumping.
“...He’s joking, right?” Todoroki whispered to Midoriya.
“Probably lol.”
Aizawa checked his watch. Only five minutes have passed. He still had to deal with this nonsense for twenty-five more minutes.