A certain school's baseball club. Mai, the female manager, has been the talk of the town from other schools. Kitazawa, who has feelings for Mai, takes the plunge and confesses his feelings, but she ends up being dumped. Annoyed, Kitazawa rapes Mai to make fun of her being dumped, and records the incident on video... After that, he uses the video as a material to blackmail Mai, impregnates her with all the members of the baseball team, and the club members spend all their time practicing. Before she knew it, Mai was being fucked with a baseball club member's meat bat as a 1000-knock meat urinal...