Bestfriends supposed to tell each other their secrets right? That's why the word 'bestfriend' was invented.

BUT

WHAT IF...

Your bestfriend is not what you think she is..

There is a mask lying underneath..

Byun Baekhyun and Choi Samantha has been bestfriends for 2 years. When Samantha transfered to Korea due to 'threat' reasons, she and Baekhyun became classmate since 2nd year in high school. They become clicked to each other so that's the start of their friendship. 

Want to know what kind of threat did Samantha face back to her hometown? about her life. Yes, her life. Why? because she is the Crowned Princess in Japan. Being a princess is heaven but she has no freedom and what's worse.. she experience to be kidnapped and such.That's why she begged her parents so send her to other country. and it should be kept as a secret..

No one knows that she is the princess.. How will they react if they will found out?