JUL-806 My beautiful sister, who I would never mess with, and I are stepchildren who are not related by blood... On a summer day, the two lose the bond of being siblings and indulge in a forbidden affair. Yuka Aota

At the end of the hot summer, I returned home to celebrate the 17th anniversary of my mother's death. Every year, no matter how busy I was, I made sure to find a reason to go home because of her older sister, Yuuka. Ever since my sister lost her mother when she was a child, she has always been my favorite woman, taking care of me in place of her mother. Although we are both married now, I have always had feelings for my girlfriend's sister that are more than just brother and sister. Then there