"It's so stimulating that I can't stop getting an erection..." My friend's mother's seductive beauty salon

Wataru is asked by Juri, a friend's mother who runs an esthetic salon, to do a trial monitor. She gets nervous and excited about her first beauty salon, but... Perhaps the stimulation was too strong for the virgin Wataru, and he couldn't help but get an erection. Then, Juri finds out that he has no experience, and continues to tease him, teasing him, teasing him, all the risqués. Wataru learns of the fascinating eroticism that adult women cannot experience with young women, and becomes increasingly addicted to the pleasures of beauty salons...