Swimmer Aoki was dating his senior, Hiyori. During a bus ride, Aoki secretly performed oral sex on her boyfriend to encourage him during his slump. However, their teammate Shio saw this and used it to blackmail and seduce Aoki. Emboldened, Shio performed the act next to Hiyori, who was asleep from exhaustion in the bus, driving Aoki to madness with pleasure…
