Seven years into their marriage... Nana and her husband Tetsu's 'unrestrained relationship.' Their marital bond begins to fray when Nana starts working at a certain art class. She is asked to be a nude model for a talented student, Kozuka. A few days later, Nana's hidden desire to be restrained is seen through by Kozuka, and she ends up being bound with rope. As the rope digs into her translucent skin, Nana begins to feel an emotion she has never experienced before...
