Possessing the body of a devil and the heart of a human after a mysterious rave gone wrong, Izuku Midoriya attends U.A. Academy in hopes of becoming the world's greatest hero. But with his rising feelings for a classmate, the threat of demons stronger than ever, and the growing distrust between heroes, can Izuku find his place in a world that wants his kind dead? (Devilman AU)

Midoriya is a kind boy able to turn into a mass of tentacles and teeth. Whether this is his quirk or if he is an eldritch abomination from beyond space is debatable. Despite being a nightmare made flesh he has the drive to be a hero. Even if his classmates are trying to banish him to the outer realms, or worship him as a god.

Izuku has an insane quirk, but not particularly the powerful kind.

The Covenant fear Demons, and Demons fear Doomguy.

Many things are decided by a chance. A chance encounter with All Might set him on the path towards becoming the Greatest Hero that ever lived in one world. And in another, the same chance set him on another path entirely. There is no future for him as a hero now. Not out in the open. Not in the light. But maybe the shadows needs heroes too. Provided he can control his power.

It turns out Izuku is just a really late bloomer with a quirk that turns his life into a game. How will he and those around him change as he fights for his dream with his own quirk? Gamer! AU. I'll try to keep Deku not OP, but I can't promise anything.