A dangerous situation I absolutely must not take: My beautiful older sister and I are step-siblings with no blood relation… Bound by our sibling relationship, we indulge in forbidden pleasures and an illicit summer. Yuuka Aota JUL-806

On a summer day filled with the chirping of cicadas, I returned to my hometown after a long absence to pay respects to my mother. My older sister, Youhua, had taken care of me in place of our mother since I was little, something I had always admired. However, on the night the ceremony ended, Youhua revealed that we weren't actually blood-related siblings...