Zashono Academy is a massive educational institution with over thirty-five thousand students enrolled across all grades. It is here that the plain and unpopular Densuke Mifune enrolls in high school. While he looks forward to blending into the crowd, circumstances change when he runs into Chiharu Shinonome, an incredibly attractive and intelligent girl who has captured the attention of all the students at the school. Witnessing the encounter between the two, Kirika Misono pressures them into joining her mysterious 'Eiken Club' to compete in the school's annual club tournament. The tournament causes Densuke to become more intimate with his fellow club members, but will he be able to maintain his composure or will he give in to their bold advances?