Sachika Akimoto, who moved from Osaka to Tokyo when her husband became independent in his work. She had longed for life in Tokyo, but in reality, she apparently felt more lonely than she did in Osaka because she had no friends in Tokyo. Of course, her husband is busy with work and doesn't pay her attention, and her loneliness grew stronger day by day. One day, her husband was away on a business trip and she had a day to herself. She went out to eat and then happened to meet a man (Jun) at a bar she just dropped into. Perhaps to fill the void of loneliness, from that day on, she was driven by infidelity and began to have affairs in search of a woman's pleasure.