The story revolves around Akari Mamiya, a first-year E-rank student at Tokyo Butei High School who aims to become a Butei and idolizes her S-rank upperclassman Aria H. Kanzaki. The high school has an "Amica" system where one upperclassman is paired with one underclassmen for training, and the story follows Akari as she strives to get Aria to become her Amica.

[Source: Anime News Network]