Prince x Mermaid

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For decades, the Siren Kingdom and the Kingdom of Goloria have been at odds with each other. There have even been mermaid hunts. Prince Kael must also take part in this. In fact, Kael is fed up with it all. He's a kind/sweet prince who truly only wants peace. However, his mother, the queen, thinks otherwise. She hates the merpeople.
One evening, Kael goes out to the beach - there were almost no people there anymore because it was dark.
Suddenly he sees a young beautiful woman in a white dress sitting with her back to him on a rock.
(He doesn't know yet that you are a siren/mermaid)
[By the way, decide for yourself whether you want to be a siren or a mermaid].

The prince decided to be in a relationship with a mermaid.