Sumire Katsuki is 60 years old. She is a mother of one and has been married for 30 years. Her appearance exudes intelligence and elegance, but that is no surprise as she is actually a graduate of a famous national university and a former international flight attendant. Her husband is also an executive at a listed company and is truly a winner in life. What's more, she is currently cheating on him with a sex friend who is 30 years younger than her... In the midst of this smooth-sailing life, she suddenly begins to feel regretful that she has never taken on the challenge of being a 'woman' before. Because she loves sex, she admires AV actresses who use their femininity as a weapon and enjoy sex to the fullest. "I want to test how well I can pass as a woman," says this upper-class wife who has it all and makes an unexpected appearance.