Tied Up Married Woman

Seven years after marriage... The "unlimited relationship" of Nana and her husband Toru. Their marital relationship begins to fall apart when Nana starts working in a certain art class. Nanu is asked to become a nude model for a talented student of Kozuki. A few days after that, Kozuka sees in the depths of Nana's soul a "desire to be tied up" and she will be tied up with a rope. At the moment when the rope digs into Nana's transparent white skin, she awakens a certain feeling that she has never experienced before.