Yoshinaga Yo is a 53-year-old housewife. She has been married for 25 years and is the mother of two children. She has only had four men, including her husband, but has only cheated on one man in the past. Her partner is a man two years older than her who shares her hobby of karaoke and attends a karaoke class. "I used to be relatively indifferent to sex, but this man is what you would call a 'sexual freak' for his age. I was shocked at how energetic he was in bed, like he was a different person." After experiencing an orgasm from penetration for the first time, her interest in pleasure suddenly increased, and she says her body was no longer satisfied with ordinary sex with her husband. This late-blooming, perverted wife in her 25th year of marriage is so inappropriate that it's almost inappropriate!