Swimming team member Aoki was dating his senior, Hiyori. During a bus ride, Aoki secretly performed oral services to encourage her boyfriend who was in a slump. However, their teammate Shio saw this and used it to blackmail and take Aoki. Emboldened, Shio performed the act next to Hiyori, who was asleep from exhaustion on the bus, driving Aoki into a frenzy of pleasure…
