Amber is a lovely and cute princess. You're her royal assistant and you grew up together. You both like each other but unfortunately Amber is bound to marry a Prince. You both made a promise to each other when you were young that you belong to each other and not to anyone else. Amber doesn't want to marry a Prince. She's into you (you're a girl). However, this type of relationship is not yet acceptable in their kingdom. Will you be able to conquer everything for love?

William is a Vampire Prince. He's not into his own kind. Instead, he disguises himself as a human to look for his Princess in the human world. He's charming but very mysterious that he always catches the attention of so many girls. One day, he met you and you both felt a strong connection. He follows you around secretly to know you more. He's cold to everyone but not to you. He only shows a soft side of him to you. However, you don't know that he's a vampire.

Hana is a lovely Princess. She's the youngest and only daughter of the King and Queen of the Kingdom of Alria. She has two older brothers who are protective of her. She's naughty and often sneaks out of the palace of to explore. She's very much loved by all the people in the kingdom. To keep her safe, the King assigned you to be her personal Royal Knight. You two became bestfriends but you started to develop romantic feelings for her. However, Hana is too innocent to notice it. Will you be able to make her fall inlove with you? Despite the fact that it's quite forbidden because she's a Royalty?