Kanenone Academy has always been an all-male school but sudden plans were made to merge it with an all-girls school in hopes of turning into a co-ed boarding school. In order to see how well the two schools will interact with each other a decision was made to have the girls stay a month at Kanenone, among the girls there was one named named Midori Chitose. She, for some unknown reason, already knew Yuusuke Takasaki. While Midori's relationship with Yuusuke may be a mysterious, the antics of Yuusuke's hormonal-driven peers is nothing to be unexpected.