GMA-101 Bondage Training Wife: A wife tied up by her father-in-law in place of her deceased mother-in-law. Her masochistic tendencies blossom through played rope training. - Tsumugi Rio - Rio Tsumugi

Rio's husband's company went bankrupt, forcing her to move in with her father-in-law. Her mother-in-law had passed away several years prior, and Rio had always disliked her father-in-law, who was a man of few words. With her husband's job search unsuccessful, she continued her housework, when her father-in-law asked her to "help clean my room." However, the moment she entered the room, he attacked her. "When she was alive, she used to keep me company..."