必然地,他们卷入黑帮仇杀、势力争斗当中,山本凭着心狠手辣,冷静果断,再身边有忠诚的手下加藤(寺岛进饰)以及黑人丹尼(欧玛•艾普斯饰),剿灭墨西哥贩毒党,不断壮大自己的地盘,四处挑战其他帮会,还拉拢一大黑帮头领白濑(加藤雅也饰)的甘心加盟。但是黑手党已经将目标瞄准了他们,一场血雨腥风的恶斗在所难免。
Tanaka Tetsuro is excited at getting a full scholarship at a new high school, far away from his family. What he does not know is that he will be the only boy in an all girl school, and that there is a girl head-over-heels in love with him, waiting for his arrival. But his special friendship with the very cute and dynamic Asuka also causes him to get into a lot of trouble with the powerful student council leadership, as they are at open war with Asuka and her five friends, a group of super amazon warriors called the Koi Koi Seven.