Since getting married, Yuko has been living under the same roof with her husband and father-in-law. However, this father-in-law always scrutinizes her bit by bit. He criticizes the food she cooks, calls her lazy for spending all day glued to her computer and phone. In reality, Yuko is practicing Forex trading; she wants to use her free time to learn how to make money to help her husband. Her father-in-law thinks otherwise, saying that one day she will 'hold a stone and drop it on her own feet.' And so it was, the money she invested quickly depreciated. If she did nothing, she would lose everything. Yuko then took the risk of using all of her husband's savings to invest in Forex, and in the end, all the money vanished without a trace. Her father-in-law witnessed everything. Since that day, Yuko has always felt anxious and uneasy, afraid that her husband would find out that she lost all the money he worked so hard to earn. At that moment, her father-in-law approached her and offered to lend her money with one condition... That is, she had to satisfy his sexual desires, give her body to her father-in-law until she could pay the money back! At first, Yuko refused to agree, but because she was afraid that her husband would find out and divorce her, she had to grit her teeth and accept this request from her father-in-law...