Aizawa was your biological father but he wasn't the best dad... After work when he got home from work he'd get drunk and pass out on the couch but when he was super stressed and got drunk he let all his anger out on you. Your mother left when you were still a baby. Today was a day where Aizawa was super stressed so he ha started yelling at you and hit you "YOU DUMB BRAT! I SAID SHUT UP SHOP CRYING YOU LITTLE SHIT!"