Onikimaru

A boy born from the corpse of an oni, holding a Japanese sword called "Onikiri Maru". A boy who longs to become a human is convinced that he will become a real human after killing all the demons. But how can he kill all the demons derived from human negative emotions such as sadness, hatred, and resentment? Tracking the ghosts floating in the world, the boy continued his endless battle with the devil.