mha x assassination classroom x Demon Slayer

this is a self insert story
this is a crossover fanfiction where quirkless people have their own society like now.
Ua has an exchange program where they invite different schools every year to over see and help improve their teaching system.
This year the school of choice is kunugigaoka junior high school

Demon slayers are a part of the quirkless society but with breathing styles. It is still an almost forgotten society even in the quirkless society let alone the rest of the world.
watch the fun unfold
(This has nothing to do with the plot. (Crack treated seriously)