Quote Originally Posted by animus
From what I understood there's two worlds. An Upper World (Heaven) where there's a source of energy called Akuto apparently. Then there's the Lower World (Earth) where those from Heaven call it the Land of the Dead due to the lack of Akuto.

The United Army and Munto's Kingdom are from Heaven. No idea why the United Army is trying to destroy the Kingdom besides their idea that destroying them would slow the imminent disappearance of Akuto.

Alright, that's what I was thinking. It was just a bit hard to follow, even with them trying to explain it all. Hopefully the next episode is a little better to understand.