The track team member Yui, who was told she was on the edge of qualifying for the competition, applies to attend a training camp for intensive focus. However, upon arriving at the camp location, she finds only herself and the coach present. Taking advantage of the absence of other team members, the coach begins to touch Yui's body in a lewd manner while she sits on an imaginary chair. Anticipating her inability to resist, the coach, under the pretense of making her endure the exercise, presses the head of his penis against Yui's vaginal opening... Desperately trying to prevent him from pushing down, Yui eventually reaches her physical limits, and little by little, he slowly inserts his penis inside her.