Setting: In the future, at the city.
Conflict: There was a conflict between a boy and modern society. The boy found the lost thing but modern society didn't seem to accept an existence of those creatures.
Climax: The boy lastly find a place where the creatures live together. However, he had to say a good-bye to his lost thing there.
Symbol: The people at the city symbolizes our modern society today which gradually losts human communication and kindness compared to the past.
Irony: The first place where the boy and the lost thing went wasn't actually the place where the lost thing should go. That place couldn't help them.
Theme: There are something that are going to be forgotten as the time goes.