From Aerandria Scans: 6u2z6g
"You've always belonged to me since long ago."
In order to get revenge against the enemy nation, who destroyed her own country, Hina decided to become their crown princess... However, she cannot help being attracted to Ashiru, who's supposed to be her enemy...
3 Volumes (Complete)

After Saiunkoko Monogatari, I think this is the best "period" manga I've read. Although, only 1 chapter out so far, I've already quite ahead with the drama CD. So, I already knew what happen later ^^
Anyways, what I love about thsi manga is firstly, is the art. Yuki Kairi is actually an amazing artist. I've seen some of her other works (which mostly a novel illustrations). As for the plot, by reading the chapter 1 you'll know how good it is. And later, it become even more interesting. Those two had a lot of obstacles to go through.
Hina is quite an interesting character. Although, in the beginning she's.. I might say a bit (just a little ;p) annoying and selfish. She trusts Minami TOO much, which is actually her biggest mistake. Ashiru on the other hand, in the beginning he seems like a selfish & forceful prince, but.. you'll found out why he's harsh towards Hina.