Ryu's husband is a successful businessman, and she lives a happy life with him and his family. Her husband, Toshio, lost his job due to a company restructure. Despite searching for a job everywhere, he has not been able to land a job yet. The pressure from his father, and even being looked down upon by his younger brother, has caused Toshio to be stressed. The only thing that can comfort Toshio is admiring the beautiful body of his sister-in-law. Toshio often peeks at the intimate moments of his younger brother and sister-in-law. When the younger brother goes on a business trip, the pressure from his father as well as the teachings from his own younger brother make Toshio lose control. One evening while Ryu is sleeping alone, Toshio forcefully takes her body. The next morning, when he has calmed down, Toshio realizes his mistake, he immediately goes to apologize and beg Ryu for forgiveness. Thinking she would never forgive him and planning to leave, Ryu suddenly grabs his hand, looks at him with deep affection. And they both gradually understand each other, they willingly come together, and start this forbidden relationship...