Boksureul Wihan Gyeolhondongmaeng

Empress Olivia knows happiness is the last thing she deserves, but when she finally becomes pregnant with the emperor’s child, she thinks things might finally be taking a turn for the better. Alas, Olivia realizes how naive she was when her husband poisons her tea, killing both her and their unborn child. When Olivia opens her eyes again in the body of an unknown woman in the slums, she vows to take vengeance against the emperor. To do so, she forms a marriage alliance with her former fiancé, Duke Lucas Viterpan, the true heir to the empire who was deposed in a coup. Will this man and woman who had everything taken from them succeed in getting revenge?

(Source: Tappytoon)