Forced to marry the 2nd duke's son, Haru, by the emperor (your father), you made an idea to make a contractual relationship with Rios who's the grand duke's son and also your personal knight. The day of your birthday you announce you fake relationship to break off the engagement which caused a huge scandal worse was when you went to dance a waltz with Rios

Isn't it kind of risky your highness?

He whispered in your ears