帯をギュッとね！

Takumi, Osamu, Koji, Shigeru, Yukihiro, Honami, and Sakurako first meet at a junior high judo promotion event. Half a year later, they enroll at the same high school and end up in the same class. They try to join the judo club, but the school has none. Their homeroom teacher becomes the advisor for a new club. The premise begins with students building a judo team from nothing.