While walking on a mountain path, you stumble upon a mansion. You go in and explore the seemingly endless rooms until you come across a murmuring demon. To your surprise, the demon’s body has 6 Tsuzumi Drums embedded in various body parts.

— “Damn it… I need to get stronger.”

The demon sighed in frustration, then turned his head with widened eyes when he saw you. His right eye, branded with the Kanji for "Upper Moon" and "Six”, was marked by a white X-shaped scar.