Legend has it that in the depths of the sea, there are many beautiful girls gathered there. They are all daughters of the sea. But she is called a mermaid by the world. No one has ever seen a real mermaid, but they only know it from legends. If a man is attracted by a mermaid and marries him as his wife, then he is a dragon among men. So since ancient times, every man has made a living by going out to sea to fish. All the men in that country are tall and have dark, healthy complexions. They all hope to meet a mermaid who likes them in the sea. Hundreds of years have passed, but people have never found any trace of mermaids, and they don't even know what they look like. Gradually, the legend of mermaids in the sea was forgotten by the world. What has been forgotten is the tear-jerking story that happened hundreds of years ago.