Yuriko Shio is a married woman living in Kobe. Her husband is serious, dependable, and idealistic, but shows little interest in sex. Longing for more cunnilingus, she secretly wears a remote-controlled vibrator and becomes increasingly aroused in public places like parks and a Ferris wheel. At an outdoor hot spring bath in a resort hotel, she spreads her legs wide and writhes in ecstasy as she receives intense cunnilingus. That night, with her hands tied and suspended from a pillar, she is tormented by the vibrator and repeatedly brought to climax. The next morning, she actively seduces her lover, embracing a bold new chapter in her life.