Half a year after her husband's passing, Yuna found herself moving into his family home. With her brother-in-law still overseas, she now lived alone with her sister-in-law, Yuko. Yuko warmly welcomed Yuna with a smile, and the two beautiful married women began their new life together. That night, Yuko suddenly kissed Yuna. Though Yuna tried to resist, she found her heart trembling at the warmth of Yuko's lips. Yuko, too, harbored intense feelings for Yuna. In truth, Yuko had been introduced to lesbian pleasure by her mother-in-law back when she first married. Now, those memories reignited a hidden passion between the two women.