When males unexpectedly enter areas they have not been permitted before, some females may become upset. Therefore, when it is decided to merge the elite Yuihime Girls Private Academy with the coeducational Kagamidai Private Academy, everyone must take extra precautions to avoid any issues while combining the two academies. Instead of simply bringing the boys from Kagamidai into the Yuihime girls' school all at once, a plan is devised in which a group of test males will be introduced first to the Girls Private Academy.
As a result, young Shingo finds himself being thrown as a sacrificial lamb to the lionesses of Yuihime, who are not exactly welcoming him with open arms. Will Shingo be able to survive the estrogen-soaked death trap that is Yuihime? Can the girls learn to be more receptive to the boys? And just how long until something involving panties causes emotions to flare, sparks to fly, and the battle of the sexes to erupt?