Your Hero Arrives!

Dekiru was in the middle of his patrol when he ran into some boys in a dark alleyway - but it's clear these three aren't friends when he sees one of them on the ground and being bullied by the other two. The question arrives is that, what kind of A Hero(-in-training) would he be if he didn't step in?
Or; Izuku 'Dekiru' Midoriya saves someone.