Water and Air: The Sea's Blessing

Once upon a time, a mermaid princess was given a gift: to three times be able to turn her tail into legs. With this gift came a duty. In order to save her undersea kingdom, she was fated to fall in love with a human man and bear his children. One day, she rescues a man from a shipwreck, and her tail parts into legs. But not even love at first sight will make her fate an easy one.