Munto (2003)

The main source of energy (Akuto) is running low. A collection of invisible islands that float above our world know as the heaven has united against the Magical Kingdom that uses the most Akuto. In order to save both the heavens and the Magical Kingdom, the magical king Munto travels to the lower world to find a young girl he saw in a vision. The girl named Yumemi is able to see the floating islands above the lower world. Munto believe she is the key to save everyone buy Yumemi herself is unsure of what help she can be.