One night, Iroha is taken to a sex club by the man she is having an affair with. When the man invites her to have sex with him, Iroha refuses, and the man flirts with another woman. While she is fidgeting, a black man calls out to her. She is excited when he shows her his huge penis, and they make love. After that, she goes home, but her husband makes a nasty remark. Since then, she has been thinking about that night every day. Unable to forget the pleasure, Iroha to the sex club. When she wakes up, she is surrounded by black men and penetrated by their huge dicks. She can't go back to her daily life...