Hiroshi misses the last train and ends up staying at his friend Yutaka's house. When Hiroshi wakes up in the bathroom, he sees Yutaka and her beautiful fifty-year-old mother engaging in the forbidden act of devouring each other's genitals. Incest between a friend and her mother. Hiroshi, who feels abnormal excitement, visits Yutaka's mother in her fifties when she is away. Her fifty-year-old mother, who has a strong libido contrary to her beautiful and neat appearance, sucked not only her son but also her friend Hiroshi's meat stick and raved about her pleasure.
