A younger couple decided to let their brother, who lives in the countryside, stay for one night. When they casually ask about their baby-making situation, Rio's eyes only express loneliness, perhaps because they are sexless. Sensing those feelings, the brother approaches Rio. Unable to refuse, Rio moans and has intercourse with her brother-in-law even though her husband is sleeping next to her. This work is a work that has been split from [aqmb00012] and recorded.