[Machine Translation] Keigo, who was killed by a monster called "Inu", the president of the Jouwakai and his gang members, who were like parents to him, were killed by the monster. Keigo swears revenge, but the "dog" keeps chasing him, and he can't even find a way to survive tomorrow. At that time, he is rescued by a large man named Natsumi Iida, who runs a "anything goes" shop specializing in rough jobs. At first he was disgusted by Natsumi, who finds pleasure in violence, but he came to have a glimmer of hope in Natsumi's overwhelming power, which he did not have. Natsumi whispers to him, "Hire me," and Keigo asks her to help him take revenge in exchange for his life...?