A palace coup changed the fate of Tang Wanying and Qin Yao drastically.
One of them changed from the legitimate daughter of the Marquis to the palace maid of Sasao, and the other changed from the son of a palace servant to the young emperor.
Later, Tang Wanying became Qin Yao's concubine and was promoted to queen step by step.
The emperor and the queen worked together to regain power from the queen mother and jointly created a prosperous world in Daheng.
(PS: The male protagonist is the only female protagonist from beginning to end, and she is clean both physically and mentally.)