Принадлежащий:Aoki, a member of the professional swim team, was dating his senior, Himori. On a certain moving bus, Aoki secretly performs oral service to cheer up her boyfriend who is in a slump. However, his teammate Shiomi witnesses this and uses this as a joke to blackmail Aoki and seduce him. Shiomi, who is feeling better, starts acting next to Himori, who is tired and sleeping on the bus, and drives Aoki crazy with pleasure...