

Akari Mamiya is in Year 1 at Tokyo Butei High School. Although she is currently in E Rank, her goal is to become a BUTEI like Aria Kanzaki, an Upperclassman in Year 2. In order to receive training from Aria, Akari submits a request to become Aria’s Amica.
Since Akari has been talking about Aria all the time after she became Aria’s (yet to be official) Amica, Shino increasingly becomes worried that Akari may not stay a close friend with her. In order to resolve the situation, she invites Akari to her home.