A junior high school student spends his nights hanging out at the disco. At home his parents are more interested in swapping partners with willing couples than spending time with their son. One evening, while shoplifting, a young woman gives him a hand and helps him pull off the snatch. Mesmerized by the woman he follows her to where she lives. After he makes a fumbled attempt at raping her she lets him stay and they spend a lazy summer together.
Momoko wakes up from a 17-year slumber and returns to her husband. However, during the day, Momoko is a free-spirited woman who pursues the man of her dreams and leads him to ruin, and at night, she is a chaste young wife. Her young body and double sex life hide a serious secret...