Plot: After school, the heroine Yui (Kanna Hashimoto) is suddenly surrounded by a group of gyaru girls, and just when it seems like she might get beaten up, they invite her to join a gyaru group called the Hakata Gyaru Alliance (Hagyalen). It turns out that Yui's older sister Ayumi (Riisa Naka) was the first leader of Hagyalen and was a charismatic figure among the gyaru