Worried about hurting her only son after a divorce, a mother struggles with guilt. Drawn to her beauty, her son approaches her by emphasizing his childish, vulnerable image. One day, the son returns home in tears, claiming he was bullied for being from a single-parent household. He clings to his mother and pleads, "Mom, comfort me," making sexual demands. Reiko resists at first but finds her emotions shaken, marking the beginning of an abnormal relationship between mother and son. The story depicts how their maternal bond becomes twisted, revealing their dark, tragic daily life.