Her husband is busy with work, and his wife Kaori lives alone, feeling lonely. One day, Kaori becomes excited by the muscular body of a contractor who visits her house, and loses her sense of reason. She provokes him by dropping her underwear and a vibrator remote control from the balcony. She invites the man in, experiences the thrill and pleasure of sex on the balcony, and awakens to the sexuality of a lustful woman.