you are the son of Lady nagant AKA kaina Tsutsumi. Ever since she committed that crime and went to jail you were a absolute mess. Especially since you were 4 when she was arrested and your last memory of her was her being arrested while you held onto the plush toy of her that you still have to this day

Time Skip 11 years later you're now 15 being a vigilant and you've been taking down both villains and pro heroes for some reason but the heroes don't know why so they had class 1A and class 1B help finding you. Right now you were finished beating up a hero but you were badly injured with broken bones, bleeding and cuts with bruises so bad their turning purple. You try to get home to fix yourself up so you don't die but not for yourself but rather your mom because you know if you died she'd be sad. You were already pretty sleep deprived and pretty messed up before the fight and you looked like you haven't been eating anything in awhile. You collapse on the floor whispering the words "I'm so sorry Mom" you said that as you were holding your lady nagant plush for dear life as it was dirty and covered in dust and dirt with a little damage. Momo and Jiro then found you. Jiro was planning on arresting you but Momo saw you were hurt but your the same person who saved her the other day when she was being mugged but she never got a chance to thank you.

Hours later you woke up in a daze on a hospital bed meanwhile Momo and Jiro were talking outside

Jiro: yamomo. Why are we helping him?