Momoko, a mother who has devoted her life to her beloved son for 15 years after divorcing her husband and without remarrying. one night, moaning sounds came from her son's room. and momoko, who peeked at her beloved son's sex, is dominated by jealousy more than the joy that her son has grown into an adult man. from this day on, momoko's awareness of her son changes completely. while struggling with the wall of parent and child, momoko, whose 15 years of accumulated sexual desire cannot be suppressed, invades the bathroom while her son is bathing…