The Tale of a Tail

Synopsis :
The story follows a group of children, led by their leader Vulpes on a journey through wilderness, as they hunt for a fox tail – an artefact that has been passed down through generations of the local community. On their quest, Vulpes, who feels being already adult, realises that in order to grow up, he must lead the children to believe in magic.
Are we no longer adults, if we believe in miracles?