Door II: Tokyo Diary: Ai is a call girl that makes good money for what she does but there’s always at risk no matter how good the money is. The job makes her feel free and in control and likes the danger that surrounds her. Her clients vary from normal to weird but her new client: Mr. Mamiya is… different. Mamiya is strange, charming, and very captivating which makes Ai very interested in what he has to offer and what he wants. Mr. Mamiya likes to explore sexuality and the art of S&M which intrigues Ai and continues to meet with him, and their relationship gets deeper and deeper.