Miyuki Shiba is about to start her first year at First National Magic University Affiliated High School with her beloved (maybe a bit too beloved) older brother Tatsuya. The siblings are very close, but First Magic High is one of three national schools that divides its students into two courses – and Miyuki, who has more obvious talent, is placed in the more desired Course 1 while Tatsuya has been enrolled in Course 2, which the school's toxic social system labels as inferior. Miyuki knows her brother is no such thing, but will she be able to navigate the perilous peer-infested waters of high school and still make it clear that she won't be kept away from her brother?