Since childhood, the son has lived with his mother after his parents' divorce. However, when his mother remarries and starts a new family, the son begins to develop intense feelings toward her. As his mother's relationship with her new husband continues, the son becomes increasingly captivated by her voice and appearance. Night after night, he grows more obsessed with his mother and stepfather's sex life, fueling his urge to secretly record them. One day, the son sneaks into his mother's bedroom, determined to film her having sex with her husband. But his mother senses his presence, and when the camera is discovered, an unexpected turn of events unfolds. The mother deeply loves her son and values their bond separately from her marriage. As the son's close friend, who also adores the mother, starts making advances toward him, the mother takes bold action to express her own emotions. With the son's desires, the mother's affection, and the friend's interference intertwining, the story takes a dramatic new turn.