My Hero Academia: Vigilantes

Vigilante - My Hero Academia: Illegals - is a spin-off manga written by Hideyuki Furuhashi and illustrated by Court Betten and was published in Shonen Jump GIGA before moving to the Shonen Jump+ App.

Summary
The manga is about a young man who is using his Quirk to help others. After he and another person are harassed by a group of thugs and saved thanks to a vigilante, he is recruited to become a vigilante by the one who saved him; the old man called Knuckleduster.