(Today, panties were hanging out to dry on the balcony. That's because we were having sex. (A sign that she is having a secret relationship with her husband) Newly married Rei is sexually frustrated but feels suffocated in her relationship with her conservative husband. One day, Nakata, a middle-aged bachelor, moves in next door. After meeting him, Rei's desires are gradually liberated. Rei sends a sign to him by hanging her underwear out on the balcony when her husband isn't looking, and the two begin a secret relationship. She invites him into her room under the pretext of repairing the air conditioner, and they meet up while her husband is away, and Rei gradually becomes bolder.