Rie, who lost her husband in a car accident three years ago, lived with her bloodless son, Yuma. Yuma is fascinated by her young and sexy mother-in-law. On the other hand, Rie has been frustrated because she has kept her chastity for the past three years. One day, when Yuma's older brother Haruma's wife Saki, who died in the same accident, visited, the relationship between the two went in an unexpected direction.
