Chainsaw Man #1

Denji is an orphaned and poor boy who works as a devil hunter together with Pochita, the chainsaw dog demon, for some yakuza. They also desire the power of demons and attack Denji and Pochita, but on the verge of death, the two merge to become Chainsaw Man and manage to survive. Makima, a Public Safety devil hunter, arrives at the scene and recruits Denji to work for her, and the promise of a better life working alongside the beautiful young woman motivates him.