When Yuihime Girls' Private Academy and Kagamidai Private Academy are set to merge, a cautious approach is taken to prevent conflicts. Instead of immediately integrating Kagamidai boys into Yuihime, a test group of males is introduced. Shingo, a young boy, becomes the first male student at Yuihime, facing a less-than-welcoming reception from the girls. Amidst this gender clash, Shingo must navigate the challenges of his new environment. Will he survive the trials at Yuihime, known for its strict female dominance? Can the girls overcome their initial resistance towards the boys? As tensions rise over trivial matters like panties, the battle of the sexes looms, ready to ignite fiery confrontations and unexpected alliances.