I will write about the animation.
Characters:A boy and a fish(mermaid)
Where and When: In the country where people hamper the free imagination. It's long,long ago.
Relationship: The boy and the mermaid are friends, but the mermaid is actually a mere fish. Pople in that country prohibit freedom.
Problem: The boy wants to be with the mermaid and believes that the mermaid is really his friend. However, people in that country don't believe him.
Ending: I think this story will be a happy ending. The boy will be able to live with the mermaid.
I think this story is very difficult to understand...