57-year-old Keiko has a charming and endearing personality, yet behind her image as a housewife with a grown son, she has secretly applied to work at a delivery health service. Her interest in the job stems from the thrill of having sex in public and the pleasure of being the one receiving service. Unlike private sessions, she finds a special allure in performing in open, exposed settings. While being pleasured with cunnilingus and having her pussy thoroughly pounded, she maintains an adorable shyness. She gets fingered to squirting, enjoys full-course sex, and ultimately swallows cum from her pussy at the end—an intensely erotic series of acts that bring out Keiko's hidden charm and curiosity.