15 years after breaking up with her husband, Momoko has devoted her life to her beloved son without remarrying. One night, she heard gasping from her son's room. And Momoko, who has peeked at her beloved son's sex, is dominated by her jealousy rather than her joy that her son has grown into an adult man. Triggered by this day, her awareness of her son changes completely in Momoko. Momoko, who can not suppress her libido that has accumulated for 15 years while conflicting with the wall of her parent and child, invades the bathroom while her son is taking a bath.
