(Today, there are panties hanging on the balcony again. That's our signal to have sex.) Rei, newly married, feels suffocated in her conservative husband's relationship while harboring sexual frustration. One day, a middle-aged bachelor, Nakata, moves in next door. From their encounter, Rei's desires gradually begin to unravel. Rei secretly hangs underwear on the balcony as a sign, and the two start a secret relationship. She invites him into the room under the pretext of repairing the air conditioner, and they have trysts while her husband is away, with Rei becoming increasingly bold.
