After his encounter with Upper Six, Daki, Zenitsu is sure that she is a demon; however, Daki also realizes that he is a member of the Demon Slayer Corps. Shortly after, Zenitsu disappears. Tanjiro and Inosuke, who have gathered for their regular meeting, are notified of Zenitsu's disappearance by Uzui and told to leave the Entertainment District.
That's why no matter how hard
I searched inside the building,
Por eso no encontramos pasadizos
en todo el edificio.
Por eso no pudimos encontrar
ningún pasadizo secreto.
Por isso que não importa o quanto procurássemos 
dentro do prédio, não encontrávamos uma passagem.