「朝の玄関で隣の奥さんと毎朝3分間だけ不倫をしています」冷え切った日常に生きる主婦・操。隣に住む大学生と偶然知り合い、そして――。夫が出勤した直後、チャイムが鳴る。扉を開ければ、そこには彼がいる。玄関先でたった3分間、激しく求め合う二人。それ以上は踏み込めない。お互いの生活があるから。夜、夫に抱かれながら、操が想うのは彼のことばかり。昼、誰もいない部屋で、彼が呟くのは操の名前。踏み込めば壊れると知りながら、扉を開けずにはいられない。やがて彼が求めてきたとき、操は、受け入れてしまう。背徳感の中、中出しセックスを求めてしまう操。

"Every morning, I have a three-minute affair with my neighbor's wife at her front door." Misao, a housewife living a cold and uneventful life, accidentally meets the college student who lives next door, and then— The doorbell rings as soon as her husband leaves for work. When she opens the door, he is there. For just three minutes at the front door, the two passionately desire each other. They cannot go any further. They each have their own lives. At night, while being held by her husband, Misao can only think of him. During the day, in the empty room, he whispers Misao's name. She knows that if she goes further, it will break, but she cannot help but open the door. When he finally desires her, Misao gives in. Amidst her sense of transgression, Misao finds herself craving unprotected sex.