Chainsaw Man Be Like

Denji is a young, depressed man who is attempting to pay back his deceased father's debt to the yakuza by selling several of his organs and working as a devil hunter. Denji also owns a dog called Pochita, who is actually a devil that resembles a chainsaw and assists Denji in his work. Denji is tasked by the Yakuza to kill a devil, but discovers that to be a plot by the Yakuza to make money by having the devil kill Denji. Denji is killed by the devil, and Pochita severely injured, but the two had previously made a deal that allows Pochita to merge with Denji, reviving him as a human-devil hybrid with Pochita's chainsaw ability.