Diana Is a Strange MermaidHagure Ningyo no Diana; はぐれ人魚のディアナ; Diana Is a Strange Mermaid; 离群鲛姬黛安娜

Once upon a time, in a certain country. A mermaid was brought to the castle. The strange mermaid with two legs was to be delivered to the king of a neighboring country... But when the prince saw her, he said, "You! Will you be my princess?!" And so begins an unexpected life together! How will the two (animals) love each other? A fairytale love comedy about two people who are in love, starting, starting...