Become the Emperor in Place of Your Brother

Jiang Xue traveled to a princess of the Wanchen Kingdom in the history books and temporarily replaced her brother as the emperor. Later, she discovered that the villain of this dynasty was actually her brother from the present who traveled through time. It was not until later that she found out that he was not her biological brother and married him. Her fiancé lost his memory and became the prince of Li State. In the end, she could not escape him.