A married woman, Eriko, tutors Toshio, a student from the neighborhood. One day, Eriko, who has had a difficult relationship with her husband recently, finds out that Toshio has no tolerance for women. She is swayed by Toshio's Kokoro and decides to teach him about women... Unable to resist the pleasure of painting an innocent, younger virgin in her own way, Eriko falls deeper and deeper into the situation. However, her jealous husband Yasunori notices her change and secretly sets up a camera. Unaware of this, Eriko brings Toshio home again today under the pretext of studying...