Yū is a young apprentice magician who lives in the Fairy World. One day, a magical error occurs, and Yū finds herself on Earth. In order to return to her world, the little fairy must find three stones that must be inserted into her magical brooch. A young girl who finds the first stone becomes Yū's companion (and the game's protagonist), and together they must find and recover the other stones.

[from MobyGames]