Izuku was bullied. why? Because he had no quirk he had no power in his world so he was neglected abused and bullied. One day his bullies chased him into a alleyway with no way out except a manhole he climbed in. The bullies not wanting to go in left him to die in there. Izuku wandered around the sewer until he found a giant green pipe he climbed inside and was sucked in.