After being fired from his job, Riko's husband Yasuyuki moves back to his parents' home with her. Riko immediately begins helping with household chores, moving busily about in her lovely, delicate appearance. Her younger brother-in-law, Shinsuke, becomes infatuated and impulsively steals her underwear while she's bathing. That night, with no spare bedding, they are forced to sleep close together. When Riko confronts Shinsuke about the stolen underwear, he honestly apologizes and returns it. But then, to his shock, Riko reaches down and touches his crotch, leading to an almost dreamlike turn of events. However, their fleeting happiness doesn't last long—Riko soon gets caught up in a troubling incident with the movers.