Hello and Welcome to my first ever fanfiction. This idea has been in my head for over two months now and this seemed like the best way to use it. I have already made the first OC, but if anyone has any suggestions for the other three, I will gladly take them. Just, please include their name, quirk name, and powers, basic personality, and home country. Thank you. I will try my best to write a new chapter once every two weeks. The day itself is not set in stone. Also, I have only watched the anime and this is set in their second year, do not murder he if I get some things wrong, like for the Overhaul arc onward. Rated M for language, violence, and maybe some smut.

It was the beginning of Class 1-A's second year, now known as Class 2-A, they were by far the strongest class in UA. Hell one of them, Izuku Midoriya, was already stronger than the 20th ranked pro hero. As all twenty of them filed into their classroom, they noticed that there were four new desks in the back of the classroom, labeled 21-24. As they all justed stared at the desks, their teacher, Shouta Aizawa, walked in with a lime green haired boy. He was about 5' with dark green eyes. He also kept swaying back and forth. He looked too young to be in their grade, but Aizawa assured them that he was 16. His hair was combed over to his right side and slightly combed upward.

"Hello class, get in your seats. I have an announcement to make" He yelled over the commotion of his students.

"As you may have already guessed, we will be receiving four new students in this class. One of them is here while the other three have not arrived just yet. Class I would like you to meet, Domenic Verdos. He is from America. I hope you treat him as one of your own."

"Uhh, Hi. I'm Domenic. If you are wondering, yes I did have to learn Japanese before I came here. I look forward to meeting you all" The kid said nervously.

All of a sudden, 19 of the students' hands went up like fireworks. They looked at him like he was the most interesting thing on the planet. Aizawa quickly flared up his quirk and everyone settled down.

"I'm guessing you would all like to know what his quirk is. I will let him tell you because I don't even understand it fully myself". Their teacher said with a bit tiredness in his voice.

"Thank sir, my quirk is called Adaptation. It is a mutation quirk and it basically makes my DNA adapt to whatever environment I am in. Like for example, does anyone in here have a poison like quirk".

Instantly a pink hand went up in the air.

"My quirk is Acid. Will, that work?" The pink girl questioned.

"Yes, it will. Please spray the highest potency acid you can make at me" He said with surprising confidence.

She gave a confused look at him, but he just nodded. So she sprayed acid at him and it hit him dead on in the chest. But, surprising to everyone, even Aizawa, he just stood there as his shirt dissolved. But his skin was perfectly fine, not even wet.

"See, I adapt. It takes my body 1 second to do it. It is annoying though. You may think that I can never lose, which to an extent is true, but that doesn't mean I always win. My body is constantly adapting, even right now. It is adapting to recognize your voices matching them to your faces, adapting to the minute differences in air quality. Hell, my stomach adapts to every single different piece of food I eat to get the best out of it. I have to consciously tell my body not to adapt all the time, so I'm not constantly eavesdropping with the best hearing possible. Also, if someone can move faster than it my adapt time, then my body gets confused and I basically become a human puddle my body's last defense." Domenic explained.

The entire class was speechless, this kid had a quirk that made his body adapt to be the best at the current situation, no matter what unless he actively stopped it. It sounded a lot like Mirio's quirk when he came into their class last year. At first, it sounded like an unstoppable, overpowered power that couldn't be beaten, but now it sounded like one of the most annoying things on the planet. They couldn't imagine what it must have been like when he was younger and had a lot less control of it.

And that is the end of chapter one. It is a lot shorter than the rest of the chapters because I want to at least get the other OCs out of the way. Also, I am giving you to decide what pairing the other three OCs are with. Another thing is that I would prefer that the three OCs you make are two girls and one boy (Because I am a freak when it comes to things being even). Thank you, and I hope you enjoyed the first chapter of Adaptation. Please review and rate. And Goodbye