Koushaku Reijou wa Tegoma wo Enjiru

The daughter of a marquess, Julianna is known as the "perfect lady" by society. However, she has a secret. She's only enjoying acting like the perfect lady! Her true self is hidden under an invisible mask. One day, she is summoned by Prince Edward, the "perfect prince" who is actually a black-hearted schemer! At the royal palace, he gives her a fiendish order. "Become my pawn. You don't have the right to say no!" (Whoa... The prince is so evil!) Julianna reluctantly accepts her duty to act as the prince's pawn, if only to achieve her long-cherished wish, which is...

(Source: NHN comico Corp.)