Dressed as Cannon Fodder, I Help My Enemy Ascend to the Throne

[Wearing books + ancient romance + women disguising themselves as men + imperial examinations + political intrigues] I am the last bloodline of the empress, and my whole family was killed. In order to survive, I disguised myself as a man and passed the exam. But my mortal enemy, the future powerful minister, turned out to be the Queen of Enemies. I should have killed him, but I couldn't help but think: If he becomes emperor and then I marry him, is it another kind of revenge?