The Royal Consort's Survival Guide

Jessica Cooper (also known as Jessica Collins) accidentally travels back in time and becomes the villainous supporting character, Consort Emily, in a TV drama. Knowing the plot, Jessica Cooper realizes that if she doesn't change her fate, she will soon be thrown into the dungeons as a sacrifice, and her family will be destroyed. Using her intelligence and kindness, Jessica Cooper eventually exposes the queen's malicious nature, earns the emperor's trust, and rises to become the ruler of the harem.