The Villainous Crown Prince of the Two-Faced Witch

Lillian is a sealed witch who is awakened by Lanfil, the daughter of a dying duke. In order to take revenge, Lillian made a pact with Lanfil and decided to enter the court as Lanfil and become a princess. Her goal is to find out the murderer of her, however, the prince she is about to marry turns out to be her old friend, which adds complex emotional entanglements and suspense.

Original Webtoon:
AC.QQ, KuaiKan