In the ancient language, the female protagonist was reborn and became her younger self, then helped her original master change his fate.

The female protagonist was reborn and became good friends with her younger self, helping her original master change his fate. She married her childhood sweetheart.
When the female protagonist was reborn, the original owner of the body was locked in a small black room. He had an asthma attack and passed away. The female protagonist was reborn.
After rebirth, he helped the original owner of the body and his family change their fate. The reborn one was brought up by his elder brother since childhood. His nephew was older than him, so he was doted on by the whole family. Once they were wronged, the brothers would go to the other party's house to demolish it.
Her elder brothers all held important positions in the imperial court. In her previous life, they were framed and their entire family was killed. The female protagonist knew their future, so she helped her family change their fate. On the contrary, there were fewer descriptions of how to help him before his rebirth.

Answer 1

The female protagonist was the Emperor's most beloved princess. In order to change herself, she swapped identities with her good sisters and made everyone look at her in a different light. However, she realized that the male protagonist did not seem to like the changed her. In the end, she realized that the male protagonist was wrong. He liked the original her. This novel had both the plot of the palace and the emotional entanglement between the male and female protagonists. I hope you like this fairy's recommendation. Muah ~😗