Mermaid. - Tezuka Osamu
I think that the main character in this story is the boy and that what he desired was to be accepted and to be allowed to imagine. The problem is that he was too honest and didn't want to lie about what he thought he saw. He wanted to believe in himself and wanted others to believe in himself as well, but not everyone was fond of people being different minded. In the end I think that the boy thought if he wasn't allowed to imagine, or wasn't allowed to be creative there was no point in living.
At first I thought it was just about a boy wasn't allowed to believe in his imagination but the more I thought about it and tried to understand it, the more confuse I got. This film made me think a lot about sticking to what you believe in and that even though not everyone will understand you, it's important to keep on believing in yourself if it makes you happy.