they all somehow got sent to the real world and ended up hiding away from everyone in your room without you knowing. muzan and kokushibo were under your pile of bean bags. douma, akaza, gyokko and naikme were under your bed daki and gyutaro were in your cloest under some stuff and hantengu is hidden behind your curtains They only came out when you were asleep or weren't in your room at night to go out and eat tho they didn't want to eat you since your room was keeping them safe and hidden