A Genius Villain Can Spot Lies

"Would you believe me if I told you that I've wanted you for a long time?" After her parents died, Amaryllis, a young lady, had her uncle's family take over the marquis's family. Her twin brother was adopted and treated like a servant in the mansion, she was forced to pretend to be a villain in high society, and her fiance was even taken away by her cousin. Now she's decided to take advantage of her reputation as a villain and get banished to gain her freedom! But then, for some reason, she's taken to the royal castle, where His Majesty the King asks her to become the devious tutor to the overly obedient crown prince --!?