Fast and the place of his hearth warming

Prologue:

If you haven't read the postcredits of Fast Tap's adventures, let me give you an account of what is most necessary for this adventure: Fast has an imaginary friend who passes like a shooting star every night, and Fast asks him sometimes wishes, in fact, he granted him the desire to have a friend like him, which was Cozy, but you how that friendship, which is where we are for this adventure, Fun Fact: that imaginary friend can accompany Fast in school, but the tree of harmony has other plans among this friendship...