In a society hostile to diversity, can Princess Mio be true to herself?

In the classic fairy tale, a mermaid princess gives up her special abilities for love. What happens if she doesn't?

Because of their special abilities, mermaid Princess Mio and her allies are kidnapped to be sold to the highest bidder. Will the revolt she organizes amongst her fellow unhuman captives succeed? At least she finally gets to meet her fiance, Prince Chika, for the first time. Or so she thinks...