I believe she ends up with the prince. She ends up developing feelings for the prince and he for her but they try to deny their feelings because they are scared that it would ruin their friendship.
The Queen simply SIMPS for Yulia and she even goes as far as to have a tea party with other foreign princess to introduce Yulia as the crown princess. Of course this is UNBEKNOWNST to Yulia. She simply thinks of it as an opportunity to repay the Queen and to help expand her
(Yulia)businesss with foreigners. Yulia pretty dense because she loves money too much. But all the foreign princesses are aware of the fact that the Queen has preference to Yulia and intends to make her the next express.
Can someone spoil me with who she really ends up with?