Furin kokuhaku: Fushidarana hitozuma

A wife listens to audio tapes that her husband sends to her while he is overseas. She becomes bored and starts to have a various affairs with strangers. But one of them becomes obsessed with her and tries to find out where she lives…

Yasuko was dissatisfied with her troubled married life. One day, she opened the door to hear a voice saying "It's delivery time," and when she went back to get her seal, she was attacked by the delivery man, Kenichi. In her fear, Yasuko was shown evidence that her body had reacted against her will, and was violated at his mercy. Kenichi took a picture of Yasuko, saying that he had asked him to. Then Yumiko came to see him, so Kenichi ran away. When Yumiko saw Yasuko naked, she realized that she had been raped.

On a crowded train, an office lady, Rika, is attacked. When Rika turns around, she lets out a cry of shock. The man is Tatsuo, who is married to Rika's co-worker, Miho. Later, Rika visits Miho's house and confesses what Tatsuo did to her, but...