Hiro has two loves, baseball and porn, but due to an elbow injury, gives up baseball, choosing a school with no baseball team. His sister Hikari attends a different school with baseball ace Hideo and the two wish Hiro had not given up baseball. Hiro joins the soccer team but meets Haruka, a very clumsy girl, who is manager of the unofficial baseball club. When the soccer team challenges the baseball club to a game, with hopes of humiliating them, the baseball club nearly loses until Hiro, disgusted by the soccer team's arrogance, switches to the baseball club. Credit to www.animenfo.com