In a dark world, the life tree live in the magic ocean, and a sprite protect it, and use magic to transfer the falling leaves to life-force. Your job is to help the sprite collect the leaves. But some leaves are special, some may be helpful and others are not. The crystal leaves, which are on the tree, indicate the life-force of the tree. When all of the crystal leaves break, the tree will fall asleep. it would not wake up until some one would like to help it and the sprite again.