It was Sunday night. There was class 1A in the dining room of their dorm, doing their homework due for the next day or having a quiet dinner. No one would interrupt them, and everything was so relaxed that Izuku could only lean back in his chair, head raised to see the ceiling, eyes closed, hands on his full belly, and a little smile on his lips that no one would take away.

He was so calm... He was even falling asleep.

"Midoriya, don't fall asleep there, go to your room to rest better!" Iida's shout woke him up suddenly, and as he turned sideways his left elbow collided against the back of the chair.

"AYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAY!" he hunched over the chair, bringing the bruised arm forward and with the other hand covering the injured elbow, shaking his left hand a lot.

"Midoriya! What happened?!" Iida shouted again, making his typical robotic hand movement, but now with a tone of concern.

"I-I hit my funny bone!" Izuku replied, stretching out his arm and waving it. "Ayayayayayayayay!" He shook himself completely.

"What happened to you, kero?" Tsuyu put a finger to his cheek.

"I-I hit the nerve in my elbow." He said again, grimacing from the cramp.

"... What do you mean you hit the nerve in your elbow?" Uraraka frowned.

He stretched out his numb arm again. "It's like I got a cramp, but from hitting my elbow".

"... Is it because you've broken your bones so many times?"

"What? No. This... It's been happening to me since I was little" He replied not knowing what else to say. Uh, he never really wondered why it happened to him, he thought it was just his luck or something.

"... " Uraraka raised her arm and started hitting her elbow with her hand and against the table. But after a while he simply stared at him. "I haven't felt anything but the tapping against my elbow, Deku-kun. That's really weird!"

"Are you sure it's not because you're breaking your arms, kero?" Tsuyu asked upon seeing Uraraka's intact elbow.

"Midoriya, don't you think you should go to the doctor for that?" Tenya asked, adjusting her glasses.

"Eh... No? It's just that..." He brought his left hand to his lips, thinking. "It's not a constant pain. I hit my elbow a lot, but... One out of... Every ten times I get the cramp from the blow, and so... it's a cramp and stuff, I've always thought it's something to do with hitting a nerve or something." He shrugged his shoulders.

The three were silent and just nodded, though unconvinced...

The next day they arrived at class, and Izuku was sitting quietly on his bench. It was getting a little chilly but not cold enough to have on his uniform jacket.

Despite his insistence that he wasn't cold, the moment another of his classmates entered the classroom, a cold breeze blew through all the seats, reaching him. This caused him to shiver and".

"Midoriya why does your skin look weird?" Sero asked from his seat.

"Uh, weird?" He turned to look at his arms, it was normal except for how his arm hair were standing up. "You mean... the goose bumps?"

"Oh no, Midoriya, what do you mean, weird skin?!" Momo stood up from her place, taking out the notebook in which she had written down the greenette's allergies "Are you getting allergies again?!

" Yaoyorozu-san, it's nothing, it's just goose bumps? " Said the boy calmly.

" ... Ah geez! " Sero stood up looking at the greenette's arms. "Is it part of your quirk?!

" ... E-Eh... " He blinked... Oh, did he forget that people with quirk don't...? Oh, OH. Right. People stopped having goose bumps time ago "... N-No, Sero... Goosebumps. " He said again. " Is it... Something that happens when it gets cold? Just watch." He rubbed his arms and automatically the bumps shrunk and disappeared.

" ... Okay that's weird. " Sero said raising an eyebrow.

"No it's not! This happens to me super frequently, it's like when it's cold or when I get chills and I get it!"

"Hmmm..." Momo brought a hand to her cheek. "Are you sure?"

"Yes, completely sure. I'll just... I'll put on my jacket, and you'll see that I'll never have skin like that again..." Izuku reached for the jacket, which was on the back of his chair, but as soon as he did... He hit his elbow again. "AYAYAYAYAYAYAYAYAY!" He groaned again, just like he did last night.

"Midoriya-kun, are you okay?!" Sero asked in alarm.

"Y-Yes! I'm fine I'm fine..." he stretched out his arm. "Aaagh that's the second time I've hit my funny bone this week and it's only been two days!" He grumbled to himself.

" Hit your funny bone? " Momo raised an eyebrow and started checking the boy's arm.

" Uh, yeah... Uh... " Now that he remembered, every time he hit his elbow in high school, his classmates would also go "Whut?" every time. Uh... Was this because he didn't have a quirk? Of course not! It happened to Uncle Masaru! He was the one who said it was called "hitting the nerve" when he and Kacchan were kids... uh, how did he explain that? " When I hit my elbow, I kind of hit it somewhere that makes my arm cramp up and-and well...

" ... Is it because you've broken your arms so many times? " Sero asked and was about to answer but Katsuki turned around in his seat, making the three of them startle.

" The nerd has had it since we were gremlins. " The blond rolled his eyes. The blond's sudden intrusion made the greenette startle.

" K-Kacchan! Don't scare me like that!

" I do what I want! " And he raised his middle finger at her. Izuku puffed out his cheeks.

" So that happens to him all the time? " Momo frowned. " And why is that?

" I don't know... " Izuku replied sighing. " Since it goes away later then it's nothing bad...

" You should go to the doctor for that, Midoriya-kun… It's not normal.

" Not normal? Ha. My old man gets it too. " Katsuki said again with a shrug.

" Yes yes yes! That " He nodded his head many times.

" It happens to me too. " Jiro said coming closer. " But I don't know why it happens. " She shrugged.

Sero stared at them and saw his tape-dispensing elbows. He started taping himself on his elbow... Ok, that's fun. Uraraka-chan and Sero-kun did the same thing.

"Uh, lemme... " Izuku got up from his place and went to see the boy's elbow. He started to itch it on one side, and on the other... " I think the dispenser would keep you from getting the arm cramp. " He said suddenly.

"Do you know where it's where you hit to get it? " Jiro cocked her head to the side.

" ... Yes and no. I know exactly where it hits Uncle Masaru but with me it kind of depends? Like... I've hit it many times and it literally just comes when it's super inconvenient…"

" ... LET'S SEE! DO HER! " Denki came bounding in with them jumping up and down. " And then me!

Jiro rolled his eyes, and Deku just listened to them argue, like they were Bugs and Lucas from Looney Tunes.

" Oh no.

" Yes.

" No, no, no, no, no.

" Yes.

" No

" No-Yes

" Yes... DENKI!

" HAHAHAHAHAHAHAHA! You know what to do, Jiro! " Denki grinned mischievously. " The bet! " Izuku didn't understand a thing but... Jiro rolled his eyes and flashed his elbow at the greenette one.

" Uh... Are you sure? " He frowned.

" Yeah, just do it already. " Jiro puffed out a cheek.

The boy sighed, and everyone there paying attention (even Kacchan, who was grimacing like if he was at a circus watching a ton of clowns making a mess) surrounded them both. He began to slowly prod her elbow, squeezing his eyes. When he did this to Uncle Masaru it was because Kacchan challenged him when they were little (por some reason Kacchan never found the exact spot), what he felt was a little bone that if you squeezed it just a little bit, it could be submerged. And when he felt the exact spot, he squeezed a little harder.

At that instant, Jiro's face changed, from one of complaint to one of small pain.

" AYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAYAY! " Jiro pulled back, squeezing, and stretching her hand.

" Oh shit, she reacted just like you! " Sero looked at the curly-haired kid with a horrified face.

" Well yes, it's as if out of nowhere your arm just decided that it won't work and then work again in less than a second, then you feel that you were electrocuted and your arm suddenly cooled down, and then it suddenly returned to normal. All of that at the same time." He explained, waving his arms.

" Ayayayayayayayay! " The girl stretched and bent her arm making a grimace. " Aaaah it's been a long time since it felt so bad. " She complained.

" S-sorry! " Deku started to make little bows by way of apology, to which the girl just waved her arms trying to calm him down.

" C-Calm down, Mido! It's okay! " Denki at that moment grabbed the girl's arm and started poking her elbow. " Don't you dare. " The girl's earpiece rose up and stung the electric boy on one ear.

" Boy, is the human body weird! " Momo commented with a pout. " I've never hit me like that, at least not that I can remember. " She tilted her head to one side and jotted down in her notebook something... "'Jiro-chan and Midoriya-kun get cramps if they hit their elbows...'" Oh.

" ... Mido, what if you do to her too? " Jiro between closed his eyes in amusement.

" Ah? " The girl looked up from her notebook.

" Yes, Deku! Do her! " Katsuki jumped back into the conversation. Oh, my. The kind of fun she had when Deku started this elbow thing...

Momo grimaced but moved a little closer and showed him her elbow.

" Are you sure? " Izuku grimaced.

" Well, I've never had anything like this happen to me, but... It could be interesting! If it happens to me, I could include elbow pads in my costume like you had at the beginning! " She smiled, eyes sparkling.

"... Oh, ok! " And instantly began to prod and touch the girl's entire elbow, looking for the exact spot... " Humm... " He was looking for a minute more, until he felt the spot and...

" EEEEEK! " Momo screamed, pulling herself back. " AYAYAYAYAYAYAYAYAYAY! " But she didn't move her arm.

" Yaomomo, you must stretch and bend your arm! " Jiro shouted from her space.

" But it hurts!

" You have to stretch it! " Izuku also said, taking the girl's arm, stretching, and shaking it.

" ... Oh!" The girl's eyes widened as she felt the cramp had disappeared with the movement. " ... This is so weird! " and her nervous laughter was noticeable.

" Hahahahaha yeah, the body is weird... " Izuku also laughed nervously.

" LET'S SEE, IT'S MY TURN! " Denki shouted, jumping in front of Izuku and showing him his arm.

" What are they doing? " Behind them was Aizawa standing. His quirk activated, obviously.

" Eek! " Denki shouted. At that moment everyone at that instant went to their places.

... Okay that was the weirdest experiment he's ever had in his life. And to think that Momo is as sensitive as he is with that nerve and had never noticed it! How many of his classmates will have that and not know...?