Miki Sunohara visits her husband's family home, where she is forcefully subjected to bondage training by her brother-in-law. Her previously unrecognized submissive nature gradually awakens, and she becomes immersed in the thrilling, pulsating sensations, passionately responding to his control. Drooling, tears streaming down her face, she screams aloud as she orgasms again and again. Her state resembles an intensely obsessive, erotic experience.