A woman named Rina, who happens to be a female teacher during her husband's lethargic period, finds herself aroused by one of her students' fathers while making a home visit. As they indulge in their carnal desires together, one of the student witnesses this act and threatens to expose Rina unless she complies with his demands. Embarrassment turns into excitement for Rina as she exposes her own lustful body, eventually taking hold of the student's erection. Meanwhile, Rina's husband becomes increasingly aroused by these events and reveals his twisted sexual appetite; both partners seek reassurance through passionate love-making.

彼氏と倦怠期中の女教師・リナ。家庭訪問先で生徒の父親の逞しい躰に興奮し父親と肉欲を貪り合ってしまう。その淫猥な姿を目撃した生徒は、リナを脅迫し言われるがままに卑猥な姿を曝すリナ。羞恥が興奮に変わり生徒の肉棒を貪る。禁断の関係にイキ乱れるリナの姿に彼氏も興奮し歪んだ性欲を曝け出し愛を確かめ合う。