Mihara Satoshi is a beautiful, sexually frustrated married woman. Fed up with her mundane daily life, she transforms into a nymphomaniac in a hotel suite. She repeatedly utters obscene words that she would never normally say in public, and stimulates her pussy like crazy, in search of a man. Unable to control herself during phone sex with a stranger, Sei calls the man over, seduces him with her legs spread wide, and squeezes his dick. The man ties her to a chair and stops just before she can orgasm, so Sei for pussy grows stronger as she shakes her big ass and devours the man.