From the introduction:
This game is all about the Anime/Manga series "Fairy Tale", a massive fantasy adventure. The point is to play for fame, power, and glory. It's to go out and seek your own personal adventure and seek what fame and treasure lies on that path.
The Fairy Tale game uses several standard "D20" concepts in a blend with homegrown rules intended to support the setting.
The Game Master's Guide includes almost all of the material presented in the Player's Guide, with additions.