The wife of a PTA president is having an affair with her daughter's male homeroom teacher. Embracing her true masochistic nature, she becomes aroused while engaging in sex in a love hotel with a camera pointed at her. In a shocking twist, she takes it further by having sex while wearing her daughter's sailor uniform—an extreme act that shows her complete transformation, abandoning all sense of parental responsibility. Later, a young male PTA committee member appears, sparking new tension between the three. As the love triangle intensifies, the story takes an even deeper turn.