One day, Karen is suddenly kidnapped and taken to a brothel that is ostensibly a traditional Japanese restaurant. In order to make money as a signature product, she is trained to develop her nipples. Her mind is worn down, but her sensitivity increases as she is trained day after day and night after night, and she is reduced to being a brothel nipple slave. Men line up in the red light district by word of mouth. Her nipples, which have now become clitorises, are stimulated and creampied repeatedly at a high rate! Just when you think they've had a break, many line up again to insert again and cum again!