A mother peers at her beloved son's sex and gets mad at her jealousy and falls in love.

After 15 years since her husband broke up, Momoko is a mother who has not remarried and has dedicated her life to her beloved son. One night, I heard a moan from my son's room. And Momoko peeks out at her beloved son's sex, and is dominated by jealousy rather than the joy of her son's growing up into an adult man. This day marks a complete change in Momoko's attitude towards her son. Momoko, who is struggling with the walls of being a parent and child, can't control her sexual desires that have been piled up for 15 years, breaks into the bathroom while her son is taking a bath...