After two sheltered years of marriage, naive Mihana suddenly faces financial hardship when her husband's employer collapses. Her brother-in-law Haruo offers her what he claims is a legitimate men's spa job, but it is actually an erotic massage parlor that includes hand relief. She reluctantly stays for the money, yet her inexperience leaves her unable to satisfy customers. Frustrated, Haruo forces her through hands-on sexual training, crossing the no-intercourse rule and teaching her through creampies.