Densuke Mifune is considered by some individuals as the luckiest man in the world due to a chance encounter with the beautiful, busty, but shy Chiharu Shinonome. As a result of this encounter, Eiken: Eikenbu yori Ai wo Komete invites Densuke to join the mysterious Eiken Club, led by Kirika Misono. The club recruits Densuke for his unassuming nature and an accidental groping of Chiharu's chest. However, despite being surrounded by insanely busty women, Densuke struggles to get closer to Chiharu due to his attempts backfiring and making him appear as a deviant pervert. The situation is further complicated by the overly sexual antics of the Eiken Club and Chiharu's younger sister intentionally trying to put Densuke in compromising positions. Although Chiharu has expressed fondness for Densuke, accidental circumstances keep pushing her away. To win back Chiharu's good graces, Densuke must act quickly. As a beauty like Chiharu is not easily overlooked, he may find competition from others trying to win her heart.