Hiro has two passions: baseball and adult films. However, after suffering an elbow injury, he decides to give up baseball and enrolls in a school without a team. His childhood friend Hikari, meanwhile, attends a different school where she cheers on the talented baseball player Hideo. Both of them wish Hiro had continued with baseball. Instead, he joins the soccer team and meets Haruka, a clumsy girl who is also the daughter of his father's boss. Haruka manages the unofficial baseball club at Hiro's school.
When the soccer team challenges the baseball club to a match, hoping to embarrass them, the baseball team finds itself on the verge of defeat. Frustrated by the soccer team's arrogance, Hiro decides to switch to the baseball club.