The relationship between her daughter and her husband is strained. Saeko is worried, but at the same time, she feels that she is the source of their deterioration. Her stepson has been sending passionate glances at her for some time now. Saeko feels his gaze and her body tingles. Her daughter may have sensed it. Saeko swore to keep her feelings hidden. But that night, her stepson came to her bedroom where she was sleeping and asked to have a relationship that crossed the line. Saeko is torn between her motherly Kokoro for her daughter and her instinct to desire a man.