This Eldest Legitimate Daughter Is Clearly Overpowered

A refined and virtuous young lady in public, but uninhibited and freedom-loving in private X A seemingly aloof, otherworldly young nobleman who is actually passionate and chuunibyou (Theme: Serve the people, not the emperor) Shen Zhifei was the beloved eldest daughter of the Shen family, treasured by everyone. The only flaw in her happy life was having to deal with an ambitious concubine. Who could have guessed that an edict from the foolish emperor would turn Shen Zhifei overnight into the daughter of a disgraced official? She changed her name and identity, becoming the third young lady of the Xu family. To everyone's astonishment, Third Miss Xu, who had been raised at an estate and was thought to be hopelessly dim, suddenly became proficient in music, chess, calligraphy, and painting, and even mastered arithmetic. In no time, she was celebrated as a remarkable talent. She made her moves step by step, using the knowledge taught by her mysterious teacher to return to the center of power. This time, she would take back everything that belonged to her! When Second Young Master Xie was little, his catchphrase was, “I’m going to be a hero!” Beside his bed hung the words, “Establish a heart for Heaven and Earth, and a destiny for the people.” As he grew older, Second Young Master Xie never got his wish to go to war and defend his country. Instead, he took his elder brother's place in the capital as a frail hostage. He had been the heir of the Xie family for so long that he was almost beginning to forget who he really was. Then one day, Shen Zhifei held out her hand to him. “Second Young Master Xie, do you still want to be a hero?” “Turns out I was meant to be a hero, a great hero who would save this chaotic world alongside her.” That was what Second Young Master Xie said.