Two students, Tanaka and Yamada, stayed overnight at their teacher's house to study. During their stay, they became captivated by the charm of the teacher's wife, Sayuri. Tanaka secretly peeks into the couple's bedroom and is stunned to see Sayuri masturbating, clearly suffering from sexual frustration. The next day, while the husband is away, Sayuri seduces Tanaka, and the two engage in passionate sex. When Yamada discovers what happened, he joins them, leading to a forbidden threesome. Entranced by the young, virile bodies of the boys, Sayuri's desires spiral out of control in this intense tale of lust and betrayal.