Shiraishi, a stoic track and field athlete, practices in the pouring rain during a training camp and forgets her spare sports bra at the training camp. Unable to do laundry due to the continuous rain, she decides to practice without a bra. The next day, a heavy downpour hits during practice, leaving Shiraishi soaked and revealing her braless breasts. Seeing this, the coach becomes so excited that he starts touching Shiraishi's body all over under the pretext of giving her instructions. Shiraishi runs away from the excessive sexual harassment. Losing his mind, the coach grabs Shiraishi, assaults her by force, and violates her instincts. From then on, the coach abuses his authority and sexually harasses Shiraishi, who cannot refuse, using the threat of being dropped from the training camp as an excuse.