The title is taken from Nana Mizuki - Canary in the Sky. This song was originally a song from Legend of Symphonia, but it feels very suitable, huh.
The background of the story is based on the Heroes of Might and Magic series, which is probably a theatrical version of the story.
I don't like much of the Naruto movie version, but I can't write anything better than the official one, so I'll just give it a try myself.
Mainly, Amway, Might and Magic, fun, fun, very fun.
In the end, maybe, it was a trap, maybe.