Izuku sat at the table, his math book closed, Kacchan across from him. He didn't look happy. "Need help?"
"No," he didn't look up.
"I can help if you want," red eyes glanced up and glared at him.
"I said no."
Shrugging, Izuku opened his backpack, they'd agreed to go to dinner together afterward and it looked like Kacchan was still working. Pulling out his notebook, he read through his notes on quirks. He flipped to the section of his classmates, mumbling as he read through each one. He knew them by heart, but he always liked to imagine each person using their quirk in different ways. Reading Kacchan's quirk, he looked up at him, he was still scowling, working through his problems.
"Stop staring at me nerd," he kicked him under the table.
"I'm not! Don't kick me."
"Then stop looking at me."
"I was thinking."
"Good, we're doing homework, you should be thinking."
"No, I mean about your quirk." Red eyes popped up, annoyed but now clearly interested.
"What about it?" He turned his hand palm side up, a small explosion shooting off his palm, he laughed.
"Not in the study hall!" Izuku whispered loudly.
"What about my quirk?"
"Well, I was reading about these people, they have," he pulled out another book, "flipping it open, "anhidrosis."
"What's that?"
"You can't sweat."
"The hell? No way, you die if you don't sweat, gimme that" reaching across the desk Bakugou grabbed the book.
"See, you can be born with it or get it later in life." Izuku leaned over the desk pointing to a highlighted paragraph. "I was thinking Kacchan, what if you got that?"
"I'm not going to get andri-whatever," he shoved the book hard so that it flew into the nerd's math book, knocking it off the table.
"Kacchan," Izuku huffed, "it's anhidrosis." He picked up his math book, slipping it into his backpack. Tapping his pencil on the table he re-read the highlighted section. He heard a small cough, looking up, Kacchan was squinting at him.
"So andri-"
"Anhidrosis."
"Yeah, that, you're born with it?"
"Yep, it's genetic, so from your family." Izuku looked up, "anyone in your family not able to sweat."
"Oi! Of course not!"
"Just checking, cause what if you couldn't sweat?" green eyes wide, "you'd be basically quirkless, right? I mean we'd be the same." Izuku looked back down, swinging his legs thinking about Kacchan without sweat. He heard a rustle, peeking up, he saw Kacchan leaning towards him.
"You said you can develop it later?"
"You can," Izuku jumped up, twisting the book back around, "see here, these are all the ways it can happen." He waited as he read through the paragraph.
"I don't have diabetes or a nervous disorder," Bakugou let out a breath, his voice slightly relieved.
"No, but did you read this part here?" Izuku pointed to the lower paragraph.
"Which one?" He followed the nerd's finger to the last paragraph.
"Didn't you say you keep getting really dehydrated?"
He read the paragraph again. "This is stupid, I'm not getting that! Get outta my face Deku," he jumped out of his chair.
"Where're you going?"
"Nowhere!" Bakugou stomped off down the hall, taking the stairs quickly, he opened up his room. Digging through his closet he found his metal water bottle. Slipping back down to the cafeteria he filled the bottle, taking a long drink. "Freaking andrihoses." Going back to the study area he sat down at the table, setting his water bottle on the table. He didn't look up at the nerd.
"You almost done?"
"No, I'm not almost done! You keep bugging me, now shut it so I can do the homework."
"Okay," Izuku pulled out his notebook again. Feeling eyes on him, he looked up, Kacchan was staring at him.
"What?"
"What, um, what's best to drink, you know, if you're really thirsty, is it water?"
"Oh, um, hang on," flipping open the book, Izuku pushed it back towards him. I guess people that have sweat issues should drink electrolytes, you know with minerals and stuff."
Picking up the book again, Bakugou read the place Izuku had shown him. "That's the garbage Ida was drinking today in class?"
"Oh yeah!" Izuku nodded vigorously, "he loves that stuff."
"Yeah, he tried to pawn it off on me, no way I'm drinking that gross stuff." Deku shrugged and grabbed the book back, closing it up, he put it in his backpack.
"I'm getting hungry, can you finish?"
"I'm trying! Leave me alone!" Bakugou grabbed his math book again, scratching out the last two problems. "There, let's go." Shoving everything in his backpack he followed Izuku back to the cafeteria.
"Hey look it's Ida," Izuku grabbed food and sat down at the table. Kacchan clattering his tray next to him.
"What's up with you?"
"Nothing," Bakugou stared at his food. Listening to the two talking he finally took a deep breath, interrupting, "you know that stuff you were drinking today?" Katsuki glared at Ida.
"I, uh," Ida glanced at Izuku, "the pink stuff?" He reached into his pack, "this?"
"That, you got any extra?"
"But you said-"
"I know what I said then! Crap, I'm asking now, got any extra?" Ida's eyes grew wide.
"Here, you can have this one," he thrust the bottle at him. Bakugou grabbed it, pulled off the top and drank, sucking down the entire bottle.
"AHHHHH," he swiped his arm across his lips, he looked at the bottle, "crap this isn't bad." Shoving the empty bottle in his backpack, he wolfed down his dinner. "Gotta run, see you guys later." Grabbing his bag, he ran out of the cafeteria.
Izuku smiled wide, green eyes sparkling. He held out his hand.
"I can't believe it," Ida shook his head, pulling his math homework out of his backpack, handing it to Izuku. "You won fair and square, but how in the world did you get him to drink that gross stuff?"