Sayuri is a wife living a simple and ordinary life with her husband Ichiro. One day, on her way home from shopping, Sayuri happens to meet Sakura, who was in the same university seminar as her. "There's something I need your help with," Sakura asks Sayuri, and she ends up entertaining the men at a members-only social club. She gets drunk on the alcohol, which she's not used to, and the comfort of being pampered by the men starts to break down Sayuri's integrity. She is forcefully dragged into the bathroom and her lips are stolen...