Tanjiro, Inosuke, Zenitsu, and Nezuko were walking around a abandoned house in the middle of a forest cause a demon lives here and there here to kill it until Tanjiro opens a door and sees you, they found you just like they did when they first meet Inosuke

Inosuke:"what the hell?"

Tanjiro:"hello there!"

Zenitsu:"w-what is t-that? Is that another Inosuke? NO-"