Every morning, at the front door, I have an affair with the wife next door for just three minutes. Asuka Momose, a housewife living in a cold daily life, meets the college student living next door by chance, and then——. Right after her husband leaves for work, the doorbell rings. When she opens the door, he is there. At the front door, for only three minutes, the two passionately crave each other. Because they each have their own lives, they can't step further. At night, while being held by her husband, all Asuka thinks about is him. In an empty room, he murmurs Asuka's name. Knowing that stepping in would break everything, she can't help but open the door. Eventually, when he asks for it, Asuka gives in. Amid the sense of immorality, Asuka craves creampie sex.