In the late autumn of 1938, Naomi is recuperating at a sanatorium in a crisp, mountainous region. Lately, she's troubled by her husband Shigeru's decreasing visits and confides in her friend Itoko. Naomi asks Itoko to check on Shigeru. Itoko agrees and goes to see him. However, Shigeru shows her erotic pictures, stirring intense arousal within her. The two repeatedly engage in passionate sex, deepening their affair. Meanwhile, Shunji, the younger brother of Itoko's husband, visits the writer Fugima to collect a manuscript. Fugima displays erotic images in front of Shunji, but becomes impotent on the spot. Yet, he becomes intrigued by the sexual encounter unfolding between his wife Kyoko and Shunji. Each character, through the presence of the erotic images, awakens to new emotions and desires.