My Sweet Villain

When Sylvia -A former assassin- dies, she is given a second chance. She is sent to a other world with a mission. Her mission is to make Lucius the cold blooded villain a king?! She also has to make trouble for the not-so-good hero's?! Bring it on! A step brother who wants to kill Lucius?! Not on my watch! A girl who want to betray and trick Lucius?! I won't have mercy! My sudden engagement with Lucius?! Wait!What?