Movie in one sentence:
Underwater Peter Pan gets pussy whipped by a fairy.
Movie in more sentences:
The realms of water and fire have long been divided after their leaders got turned against each other thanks to a jealous wind lord, but the prince of water and princess of fire find each other and fall in love. They hope to find a place where they can escape their judgemental caretakers and live in peace.
Amazingly nice animation and cute art style, but that's where my compliments end.
The story is alright, but the rushed romance dictated by this overly eager girl who doesn't get called a "princess" in the movie's title for some reason is something Disney would be jealous of. The water prince didn't stand a chance against this chick, he definitely wasn't the one wearing the pants in the relationship. He looked pressured into it. The princess looked sweet and kind, and he looked smitten, but I didn't think they were a good match.
The ending was a clear metaphor for death, so I wonder if the guy thought it was worth it.
Also, why is the sea prince red and furry and the fire princess blue and smooth? They messed up the character designs, yo.