During their training camp to qualify for the national tournament, the swimming club members at Sei Tani Academy find themselves sharing quarters with a New Half named Chibitori. Despite her feminine appearance, she reveals her manhood unintentionally, causing the male teammates to lose control over their desires and attack her... However, the mischievous Chibitori strikes back with anal assaults! Their intense anal training begins, leaving them vulnerable to unexpected penetration anytime, anywhere... #ChinP※ Delivery method may vary depending on the recording contents.