Aoki, a member of the professional swimming team, was dating his senior Hinomori. - In order to encourage her boyfriend who is in a slump, AOKI secretly serves her in a moving bus. - However, Shiomi, a teammate who witnessed it, threatened Aoki with that story and fell asleep. - On the day Shiomi was tired and asleep on the bus, he acted on the side of the forest and drove Aoki crazy with pleasure...