Prehistoric: Tongtian Transformed into a Beautiful Royal Sister

He traveled through time to reach the sky, and when he transformed, he became a beautiful royal sister! He originally wanted to change his destiny against the will of heaven, but due to the origin of the fusion system, the higher his cultivation level, the harder it becomes to regain his male body. Faced with her worried brother and the strange prehistoric situation, she decided to act bad first, and then find a way to change her back!