Mayumi, a freelance journalist, is conducting research for a piece titled "Female Masturbation: How It Differs from the Male Experience." She gathers accounts from various women: Yuri, an adult film actress who views masturbation as a form of training to enhance her sexual sensitivity; Yoko, a college student who masturbates while reminiscing about her first sexual experience; and Kazuko, a bar owner and "masturbation enthusiast" who has experimented with all sorts of fruits and vegetables. Finally, Mayumi interviews a *kogal* (a trendy, fashion-conscious young woman) named Mai—but this encounter leads her into an entirely unexpected situation…