Dorohedoro

In the impoverished district called Hole, sorcerers cross over from their own world to test magic on humans and leave without caring what remains behind. Caiman is one of their victims, an amnesiac man with a reptile head and only one bizarre clue to his past: a mysterious figure appears inside his mouth whenever he bites a sorcerer.

With Nikaido, a powerful fighter and gyoza-shop owner, Caiman hunts sorcerers one by one in search of whoever transformed him. Killing men connected to the powerful En soon attracts dangerous attention, and the chase between Hole and the sorcerers' world grows into a chaotic mixture of black magic, strange friendships, and secrets that leave nobody entirely innocent.