50-year-old Yoko Hanako has been married for 25 years and has had one affair in her life. Her children have already become independent, and her husband has grown distant sexually, leaving them in a two-year-long sexless marriage. Whether due to age or the fading connection with her husband, she feels emotionally and physically unfulfilled. With pickup encounters seeming unrealistic, she begins searching for a new path toward personal satisfaction. That's when she encounters "Wonderful Wife."