Riku Mizusawa is 46 years old. - She has a beautiful appearance that gives off a hint of sex appeal even within her clean and elegant appearance. - She is a genuine former flight attendant who has worked for a major airline. - 18 years ago, Riku happened to be on the same plane as Riku on a business trip, and she met her husband, who was an employee at a top trading company at the time. After getting married and having a child, she decided to start a family. - After that, she raised two boys and led a perfectly smooth life. - However, even such a winning wife has a secret that she cannot tell anyone. - "...I've never told anyone because I'm embarrassed, but I actually love watching pornographic videos of adultery." A relationship between a man and a woman who have random sex with a man they've met for the first time, and are filled with pleasure through self-degradation. - And I feel immoral that I shouldn't let my husband know... - Her longing for extramarital sex, which grows day by day, finally makes her cross the line. - A direct flight of pleasure and infidelity, with no U-turns allowed, takes off!