Chisato and her husband live happily together. However, her husband fails in an investment and ends up with a huge debt. Her husband's brother, who lent her the money, starts making advances on Chisato, saying, "If you can't pay it back, you'll have to keep your promise." In fact, when her husband was unable to pay back the money, he had promised his wife that he could do whatever he wanted with her. "You! You're lying, aren't you?" "Chisato, I'm sorry..." Chisato is helplessly embraced by her brother-in-law. However, this was only the beginning...