" Attack power ". It is a supernatural ability that manifests for unknown reasons, whether it is due to a mutation or a new type of virus , and because it occurs most frequently in high school students, those who possess the ability are called school students .''

They cause various frictions in their daily lives, and eventually find themselves with nowhere to go. The place where these people gather is the `` Office School ''.

A female student transfers to one of these schools, `` Taketa School .''