Eiken: Eikenbu yori Ai o Komete

Zasshono Academy is a vast private institution housing 54,000 students from elementary through high school levels. Its numerous clubs include the enigmatic Eiken Club, known for its mysterious activities and a membership composed entirely of strong-willed, excessively busty female students such as Shinonome Chiharu, the academy's top entrance exam scorer. When new high school student Mifune Densuke is compelled to join this club, his previously uneventful life is abruptly overturned by intense passion, romance, and considerable trouble.