The Long lost Princess Ga Eul and engaged to The Casanova Prince

Ga Eul is a simple girl leaving in a simple life. But one day, she discovered that she is the princess of Korea and she is the chosen one to be the heiress to throne of his grandfather , the king. Ga Eul then accepted to be the next rightful queen of Korea.One day after she lived in the palace she discovered that she was already engaged to someone. She was engaged to the top 1 player in Korea, heir of his family's museum, the biggest museum in Korea. Can she take the challenge to be the heiress to the throne?, can she take the challenge to live with the casanova Yi Jung forever?