高中女生格林是一场女帮斗殴的头目，从小就失去了自知之明，但这与以“Oniyakko kai”的身份主宰学院无关。在Ranko的带领下，Oniyakko kai不得不作为一个“玩具”调解给后面一个高中女生的校长和校长。受到校长的袭击，帮助哈鲁逃离了恶魔协会，绿日最终与兰科展开了一对一的战斗。

High school girl, green was the leader of a female gang fight galore, of losing knowing since I was a kid, but it was unrelated to dominate the Academy as "Oniyakko-kai". Led by Ranko, Oniyakko-kai had to mediation as a "toy" to the president and principal of a high school girl in the back. By attacked by a principal, helped HARUE that has ran for his life from the demon guy Association, green day is made to wind up have a one-on-one battle and Ranko.

Midori, puissante cheffe d'un gang de délinquantes, doit faire face à un principal véreux et ambitieux et à sa rivale Ranko, bien déterminée à aider ce dernier dans son ascension vers le pouvoir.