an alternate fairytale

Once upon a time, there was a princess who lived in a beautiful castle. One day, a prince came from a far away land, and swept the princess off her feet with his charming ways and gentle words. However, neither couldn't be away from their respective kingdoms for too long. The prince and princess soon fell in love and they agreed to see each other whenever possible. They traveled to other lands together, visited each other's kingdoms, and all was bright and merry. Little did the princess know, that the prince was keeping a dark secret. One day, he decided that it was time for the princess to discover his secret. He went to her, and to the princess' surprise, he turned into a frog right before her very eyes. At first, the princess thought that this was only temporary, that the prince was only playing tricks on her. But the frog hopped away in search of other frogs, and the princess couldn't do anything to stop it.