Major Bill Cage is an officer who has never seen a day of combat when he is unceremoniously demoted and dropped into combat. Cage is killed within minutes, managing to take an alpha alien down with him. He awakens back at the beginning of the same day and is forced to fight and die again... and again - as physical contact with the alien has thrown him into a time loop.

Denji is a young boy who works as a Devil Hunter with the "Chainsaw Devil" Pochita. One day, as he was living his miserable life trying to pay off the debt he inherited from his parents, he got betrayed and killed. As he was losing his consciousness, he made a deal with Pochita, and got resurrected as the "Chainsaw Man": the owner of the Devil's heart.

Denji is a young boy who works as a Devil Hunter with the "Chainsaw Devil" Pochita. One day, as he was living his miserable life trying to pay off the debt he inherited from his parents, he got betrayed and killed. As he was losing his consciousness, he made a deal with Pochita, and got resurrected as the "Chainsaw Man": the owner of the Devil's heart.