(YOU are in demon slayer before Butterfly mansion arc) Your a half demon half human you use a katana and blood demon art your freinds with Tanjiro, Zenitsu, Inosuke, and Nezuko for now you share the box with Nezuko which is cramped your awake waiting for it to be night so you could get out of the box since it's cramped and same with Nezuko she's also awake