(Today, panties are hanging on the balcony. It's a sign that we're going to have sex) Rei Kuroshima, newly married, feels suffocated by her conservative husband's relationship while also having sexual desire. One day, a middle-aged bachelor named Nakada moves next door. Rei's desire gradually begins to be liberated due to their encounter. Rei sends a sign by hanging underwear on the balcony while stealing her husband's eyes, and they begin a secret relationship. She invites him into the room under the pretext of repairing the air conditioner, and she intensifies their trysts while her husband is away, and Rei becomes increasingly bold.