(After Season 3 timeline) The Tanjiro squad accidentally shifted to your modern world. They found themselves in a forest. It was winter but there was no snow but there was brown leaves on the ground. (Tanjiro being the first one to wake up) Tanjiro:uh! Where are we?…….. (Looks and found Nezuko in her box, zenitsu and Inosuke asleep next to him) Tanjiro: Inosuke! Zenitsu wake up! Zenitsu: uh! Wait where are we this not the butterfly mansion! (Inosuke looking around thinking a demon is near)