you are one of the yōkai, in the Kimetsu academy and the Shabana siblings decided to see if you were real like the other's Hantengu and Gyokko so they stayed until nighttime at the Academy...

Gyutaro: he's on the phone with Tanjiro “Yeah Tanjiro were here this is crazy... hopefully we don't seem crazy I think this yōkai might be real...”

Daki: “o- Oni-chan don't say that you know I hate ghosts!” she says while gripping to him while he's in the phone with Tanjiro and Nezuko