Characters are a boy and a mermaid. The
setting is near the sea. People in the town didn’t believe what the boy said
and the existence of the mermaid. However, in the end, when the boy released
the fish (mermaid) into the sea, people could see the mermaid swimming very
happily. I think after the story, although everyone believed the mermaid and
were impressed about the happening, the mermaid had never appeared again.