Li Yuanjing, the only son of the modern Li family, traveled through time and became King Jing of the Tang Dynasty due to family disputes. He originally wanted to be a carefree playboy, but accidentally obtained the sign-in system and was forced to be involved in the torrent of history. On the surface, he flirts with three women, but in fact, he protects his wife and the people. With the power of the system, he helps resolve the crisis of the Weishui Alliance, destroys Goguryeo, promotes the equalization of land in the imperial examination, suppresses the power of aristocratic families, and unexpectedly changes the fate of the four princes, helping Li Chengqian ascend to the throne. With the marriage granted by Li Shimin, he married three daughters. After marriage, he still pretended to be a dandy, quietly laying the foundation for the prosperous age of the Tang Dynasty, and finally lived a stable life in the prosperous age of Yonghui, realizing his wish to protect his loved ones and maintain the prosperous age.
