The younger brother and his wife decide to let their older brother, who lives in the country, stay with them for one day. When they casually ask about the current status of their baby-making plans, Rio's eyes only express loneliness, perhaps due to a sexless marriage. Sensing her feelings, the older brother approaches Rio. Rio, unable to refuse, moans during sex with his brother-in-law, even though her husband is sleeping next to her. This work has been divided and compiled from [aqmb00012].