In Ara, Land of the Sun, live the princess Yoa and the prince Akuma, respectively and in order of age. Yoa is the eldest and in tradition, will overtake the throne when she's 18. However, when her younger brother, Akuma goes missing, she always knows where to look. He has always adored the moon, the stars. Silent darkness, and the peace. When the Princess of the Moon is released, it's up to these two siblings to save Ara, and the world.