Your Highness, Please! US

Sunwoo is a part-time employee who has nothing to show off other than her pretty face and Zeus is a prince of hidden identity from the Zerdel Kingdom. How on earth did they meet each other?
 The two, who seem unlikely to cross paths in their lifetime, get closer little by little as they meet and trace the forgotten memories of a night and beyond.
 Their subtle relationship starts to fluctuate when a secret past unfolds and a minister appears holding the key to the secret...