The Might of Sin

Nana Shimura and Yagi Toshinori died against All For One in a climactic. Only the latter survived. A young, plain-looking boy has just awakened his quirk, and this quirk may be the only hope in putting down the master of evil. This boy may grow up to become the great equalizer of all society. No sin will go unpunished by Izuku Midoriya. Crossposted from Ao3