You've heard of wishing upon a shooting star? At the “Star Road”, your wish is transformed into a star. When it's granted, it then turns into a shooting star and falls down to earth. So you see, the Star Road plays an integral role in granting wishes. But ever since a sword destroyed the “Star Road”, everything's come to a halt. No stars have been made since.
The way things stand, yours is a world where wishes can't come true anymore.