Prologue

Tanjiro is a second class citizen working as a mechanic but his life is turned upside down when his family was cruelly murdered and his sister mysteriously disappeared. Determined to find her, Tanjiro joins the slayer corp in hopes of getting revenge on Muzan Kibutsuji, the tyrannical Imperator of Luna City.

Unbeknownst to Tanjiro, Nezuko is alive and under the care of the Imperator himself, who treats her as a prized test subject. She climbs her way up the lower and upper moons, while also battling with her own humanity. Despite knowing the DEMONs are monsters, Nezuko creates strong connections with some of the upper moons.

When Nezuko crosses paths with her brother, she has to decide which path to fight for.