A girl, a mermaid.
The girl is a fisherman; the mermaid is, let's just say, a fish.
Of course it wasn't the girl who caught the sleeping mermaid with a fishing net. This is Oscar Wilde's fairy tale, and the real world is never that pretty.
In other words, good things only have the beginning.
Later, the girl died, and no one accompanied the mermaid to see the human world. The timid mermaid once again hid under the deep sea. But she remembers every word the girl said, and she remembers every time she spent with the girl.
The girl said, Ariel She is the strongest and optimistic mermaid princess, so from that day on, the mermaid's name is Ariel; the girl said that the feet turned into fish tails felt like stepping on the tip of a knife every step she took, so the mermaid really felt pain and hated walking with her feet even more; the girl said that there are many, many things in the human world. Holidays, Valentine's Day, Easter, April Fool's Day, Carnival, Halloween, Thanksgiving, and the most important Christmas, so the mermaid hides these colorful holidays in her heart, and her longing turns into a magical power. When there is no girl, she can celebrate these holidays by herself...
Thirty years later, when the mermaid once again had the courage to set foot on the land, she could no longer escape unscathed. The beautiful prologue has ended, and what follows is the cruel reality, the real world.