Several years into their marriage, Miki and her husband Junichi have grown increasingly distant. Unable to even consider divorce, Miki clings to the hope that if only her husband could become better in bed, their relationship might improve. One day, she confronts him directly. To her shock and confusion, he replies, "I want to see you tied up." This unexpected confession marks the beginning of a new path for Miki. A few days later, telling herself it's just this once, she calls a man she knows. This single phone call becomes the catalyst for a dramatic transformation in Miki's life.