Ribbit, Or What Have You.

The somewhat dashing young hero, Captain Brion Thustle, has had a rough go of it these last few years, beginning with his mother's tragic death and ending with a prolonged war. But things are finally looking up. The kingdom is at peace; there is a budding reconciliation with his father; and he is officially courting the princess of his (and everyone else's) dreams.

So, when he finds himself suddenly cursed the day before he intends to propose, Brion understandably has a bit of a meltdown.

Trusting in true love and its potent kisses, he makes the arduous hopping trek to the palace-only to be unceremoniously thrown out the window by the very hands he hoped would save him. Rescue comes in the unlikely form of his princess' infamously irritable and homely sister, and Brion soon comes to realize that there is far more to true love and Irritable Idonea than meets the eye.

Of course, there's still the minor problem of him being a frog . . .