I got this idea from a book called sharpie by randoearthpleed After izuku's mother find her husband raping their son at a young age she calls the police and he gets prison time this lead to deku having anxiety and being even more withdrawn then he already was because of his bullying however after some year he becomes a bit more open however when a new student becomes a part pf his class he makes a friend however when he starts training with all might they cannot spend as much time together and he doesn't relies he friend is becoming withdrawn his friend decided to take their own life this lead to deku trying to slit his wrists because his father who was the number 3 hero had also got out of prison and is starting a custardy battle for deku however he couldn't slit his wrists so he did something else instead of cutting him self he decided to draw on the places he wishes to cut however along his way he meets some who changes his outlook on his horrible life