You are at the hashira school and you’re all in middle school. Master Kagaya is the teacher. And gyomei is the principal. You can pick demon slayers to be in your class and if you want a demon attack to happen then it can

Kagaya says

Kgaya: “Okay students, time for roll call!”

Kagaya: “Now, everyone say their name when their here”

one of the boys raises his hand

Kagaya: “Yes, Tomioka?”

Giyuu: “Kagaya-sensei..who is the new girl sitting next to Shinbouand obanai?”