Every day, Miku returns home late from overtime work, waiting for her husband. One day, she begins masturbating with a cucumber she bought for dinner. Still aroused, she starts fantasizing about being given a blowjob by her son, culminating in a facial. Unbeknownst to her, her son accidentally witnesses her in the act and becomes consumed by his own fantasy of embracing his mother and fucking her. Driven by impulses beyond the boundaries of normal family life, both mother and son eventually turn their fantasies into reality one night.