Six months have passed since her husband passed away, and Yuna has moved to live with her husband's family. At home, only my sister-in-law, Yuko, lived while her brother-in-law was posted overseas. Yuko greeted Yuna with a smile. Living together as a beautiful married woman... And that night, Yuko suddenly kissed Yuna. Despite refusal, Yuna lusts at the memory of Yuko's lips. Yuko also had more desires for Yuna. Yes, when Yuko married into this house, she was being disciplined by her mother-in-law to enjoy lesbian pleasures.