Kanako, who has long desired a child, finds her desire for creampie sex with her husband intensifying on the night of her ovulation. However, her husband, exhausted from work, responds coldly, pushing Kanako to her limit. Late at night, she surrenders to masturbation in the kitchen. Her stepson accidentally stumbles upon the scene, captivated by the sight of his stepmother, and can't help but get an erection. When Kanako lifts her son's pants and realizes his arousal, she is forced to confront her own emotions.