5.90/10 2015-12-22 24 minutes.HDQuartet 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.An: 2015Studio: AT-XPays: Japan