After Kuro, a psychopathic serial killer, dies after being shot down by the police, he meets The Devil, who, impressed by how evil he is, gives him another chance to live instead of sending him to hell immediately. Transported to a strange new world, Kuro decides to reform his ways to repent for the sins of his past. But as he tries to live life as a changed man in this world, his psychopathic tendencies lead him to a familiar path...