Son always watches his mother Ryo as she does housework, captivated by her beauty and indulging in lewd fantasies every day. One day, after receiving a message from her husband saying he won't come home, Ryo, filled with pent-up desire, lies down to sleep, her body aching with need. At that moment, her son suddenly appears, confessing, "Mom, I can't hold back anymore," exposing his raw desire and plunging them into a tense, forbidden encounter.