Undercover Empress

비정규직 황후, Bijeonggyujing Hwanghu, Hoàng hậu tập sự, Imperatriz Irregular, Irregular Empress, Irregular Worker Empress, Ratu yang Menyamar, Temporary Empress, Temporary Positioned Queen, Undercover Empress, 我的皇后性别不明, 打工皇后, 砂時計の契約令嬢

Estella Arthur enjoys a lazy life earning a knight's wage under the persona of her fake twin brother Austin, but when the crown prince of the Alphenstine Empire comes offering piles of gold, all the cake she can eat, and a guaranteed divorce after five years in return for her hand in marriage, even she finds it hard to say no. Now she must dodge assassinations on top of avoiding anyone learning her true identity as a woman pretending to be a man pretending to be an empress.

(Source: Pocket Comics)