Read I Know Your Secret Manga:
After she was nearly killed and then rescued, Ruan Ruan lost all her memories. Her savior, Ding Xiao, treated her with all the tenderness in the world; she completely let her guard down in the face of his perfect image. After figuring out the identity of her attacker, Ruan Ruan naively thought they were heading toward a happy ending. However, after discovering Ding Xiao's secret, her world turned upside d more.. own! With danger looming on all sides, will she continue to be the prey, or will she become the hunter?