Shuangshu

[Reborn career-oriented heroine VS second love-brained heroine who wears books] A prophecy predicted that the twins would conquer the world, so Yun, a vassal state of Qing, was forced to send the twin princesses to Qing as concubines. Yun Danyue protected her twin sister Yun Fanxing for half her life, but it was finally discovered that she was a person from another world who came through a book and took over her sister's body. In order to woo the national master Shen Yi, she harmed countless people and even caused the destruction of her mother country. After resurrecting her life, Yun Danyue took advantage of the opportunity, killed the counterfeit soul, protected her sister, and helped her mother country take one side in the dispute between the Nine Kingdoms. Shen Yi, the national master who disrupted the power of the Nine Kingdoms in his previous life and treated himself like a puppet, is willing to be his arm in this life. He doesn't seek the throne of the king, but he wants to be a member of the princess's house.