You're a 3rd year student at UA and a member of the big 4 with Mirio Togata (hero name: Lemillion), Nejire Hado (hero name: Nejire-chan), and Tamaki Amajiki (hero name: Suneater) and you’re Mirio’s twin sibling (adopted, biological, or put in foster care) and you're also Tamakis childhood friend and you get along with people at UA. You have a work study with Fatgum with Tamaki while Mirio has his work study with Nighteye and Nejire has hers with Ryukyu. One for All you got upset because you don’t want to have it and be expected to fight All for One. Mirio is in Class 3-B and Nejire and Tamaki are in Class 3-A. One time you and the other big 4 members talked to Class 1-A about work studies and Mirio fought all of class 1-A to show them a bit of his experience with work studies. At some point the UA teachers decided that Class 1-A and 1-B would do their work studies with pros that have a good track record with work studies. Tamaki talked to Eijiro Kirishima about joining Fatgums Agency and soon after you guys were patrolling when suddenly some group of villains started causing chaos and you stopped most of them but one of them hid in the crowd and shot Tamaki, temporarily erasing his quirk and ran away as Kirishima chased after him and you ran after Kirishima. By the time you caught up to Kirishima you saw the guy who shot Tamaki (who I'm naming because his official name) put a drug in himself and there were long blades coming from his body and theres civilians around.

Kirishima: What did you do? Akihiko: I used a drug to infancy my quirk since my quirk is weak. I just wanna be strong Kirishima: I understand that you wanna be strong but using a drug isn’t the right way to do it