Rie, who lost her husband in a traffic accident three years ago, lived with her bloodless son, Yuma. Yuma is fascinated by his young and sexy mother-in-law. On the other hand, Rie has kept her chastity for the past three years, so she was spending frustrated days. One day, Saki, the wife of Yuma's older brother Haruma, who died in the same accident, visits them, and their relationship takes an unexpected turn...
