In ancient times, the Elemental world and our world were united. No one knows why or when, but at some point in the past, they separated. Now we inhabit our world, while the Arcana reside in theirs. Behind the scenes, the Ministry of Elemental Affairs (MEA) has been working to protect the boundary between the worlds, for they know that if the worlds were to merge again, the results would be disastrous for humanity. Now, in the skies over Tokyo, a dimensional rift is beginning to form, and the boundary between the worlds is in danger. Humanity's only hope rests with the Maidens, young girls who can communicate with the Arcana. What awaits these Maidens in the skies above...?