Infiltrating the Entertainment District

In order to investigate the suspected demonic presence in Yoshiwara, Tengen had sent his three wives to infiltrate the three largest courtesan Houses in the district. However, having stopped receiving messages from them, he has started worry for their safety. As such, Tengen disguises Tanjiro, Inosuke, and Zenitsu as girls and sells them to the three Houses in which his wives were deployed, in order to find clues to their fate and whereabouts. Though with some difficulty, all three Demon Slayers are accepted to work at the Houses. As Tengen surveys the district from the rooftops, it is revealed that Makio, one of Tengen's wives, is held captive in a secluded room in Inosuke's House, being restrained by numerous obi, and enduring interrogation from a mysterious female voice.