Touch the Sky (Hyunjin X Felix X San X Juyeon)

The continent of Quatre was divided in four nations: the Miroh Empire, the Bloom Kingdom, the Aurora Archipelago, and the Kingdom of Helios. Miroh was renown for its military power, Bloom for its traditions, and Aurora for its lawless waters. And Helios...

Well. Helios wasn't really anywhere to be seen in the big picture.

Lee Felix, sole heir to the throne of Helios, had never been too bothered with politics - that is, until the Gods apparently chose him to become the new Ruler of Quatre. With Helios suddenly dragged into the spotlight, conflicts arise and Felix finds himself put into a rather unsavory position: he has to pick one out of three suitors to marry, thus forming an alliance with one nation, but at the same time alienating the other two.

But beyond the political schemes and the threat of war weighing on his home, Felix is determined to stand his ground and prove to his fellow leaders that he is much more than a simple pawn to be played with, and that he won't go down without a fight.

(Chapter titles from "Touch the Sky" in movie "Brave")