The Villainess Princess: Fair, Beautiful, and Powerful

Modern youth Lin Yuan transmigrates into a political intrigue novel, becoming a cannon fodder prince destined to be killed by his adoptive father in just three chapters. Knowing the plot, he gives up struggling and instead pledges allegiance to the future Empress Dowager, Princess Chu Ciyou, using his knowledge of the Emperor's poisoning as leverage for a contract marriage. Together, they overthrow the Crown Prince faction and dismantle a human trafficking ring. When the Crown Prince panics and attempts to assassinate his father to seize the throne, Lin Yuan and Chu Ciyou expose his crimes publicly in the court. Ultimately, the Crown Prince is executed, Chu Ciyou ascends as Empress, and Lin Yuan transforms from a doomed cannon fodder into the most powerful prince consort of the new dynasty.