第4話: アカリはシノ、ライカ、キリンと共に、必須のブテイ高校クォーテット戦闘テストの練習を行う。

4

Quartet refers to an actual fighting test between two four-person groups and is a requirement for all the Year 1 students at Butei High. Akari forms a group with Shino, Raika and Kirin and trains to defeat their opponent, Urara Takachiho’s team. (Source: FUNimation)