Follows Tanjiro, Nezuko, Zenitsu, and Inosuke as they join the flamboyant Sound Hashira Tengen Uzui to investigate disappearances in the Yoshiwara red-light district, where Uzui's ninja wives (kunoichi) lost contact. To infiltrate the geisha houses and gather intel on the demon responsible, the group disguises themselves as women, leading to comedic moments and dangerous encounters as they uncover a powerful demon lurking beneath the district's glamour.