Hiro has two passions: baseball and pornography. However, an elbow injury forces him to abandon baseball, leading him to choose a school without a baseball team. His childhood friend Hikari attends a different school alongside baseball ace Hideo, and both wish Hiro had not quit the sport. Hiro joins the soccer team but encounters Haruka, a very clumsy girl who manages the unofficial baseball club. When the soccer team challenges the baseball club to a match, hoping to humiliate them, the baseball club nearly loses until Hiro, repulsed by the soccer team's arrogance, switches sides to join the baseball club.