Upon hearing that her daughter was having marital troubles, Kozue (Tokita Kozue) decided to mediate and help reconcile the couple. By stepping into their private matters and encouraging dialogue, she successfully brings them to a resolution. That night, she stays at her daughter's home, and while bathing, she is accidentally seen by her son-in-law. The encounter triggers intense arousal within her. Though she should feel only maternal calmness, she becomes deeply confused by the passionate emotions welling up from deep inside her body.