Yurie has a secret she can't tell her daughter. I had a physical relationship with my daughter's lover. Even though I knew it was no good, I couldn't give up the pleasure I knew once, and the relationship continued. The marriage story of the daughter who is lifted there. If realized, I will live under one roof as a mother-in-law. What is the conclusion Yurie came up with between perverted libido and hesitation to betrayal?