Izumi is taken by surprise and keeps refusing at first.However, she ends up becoming the 8th kumicho of the Medaka Gumi!

• 水手服和机关枪这两个根本不搭调物品，从此便产生了联系，记录下一个女高中生阴差阳错变身黑社会老大，并带著目高组的手下浪迹江湖共同打拼的故事。