Arcana Heart

is a 2D arcade fighting game series developed by Examu Inc. (formerly Yuki Enterprise). The first edition was released to arcades (mostly in Japan, but a few in other countries) in late 2006. The games feature an original all-female cast, and after choosing a character, the player chooses an "elemental alignment," or Arcana, which determines the character's special moves.

A manga adaptation based on the video game was serialized on the March 2008 issue of Comp Ace magazine. It was written and illustrated by Bermuda Saimaru and was published on January 26, 2008.

Plot
In ancient time, the Elemental world and our world were joined. No one knows why or when, but at some point in the past, they split. Now we live in our world, and the Arcana live in theirs. Behind the scenes, the Ministry of Elemental Affairs (MEA) has been working to protect the boundary between the worlds, for they know if the worlds ever merged into one 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...?

Other Sources

 * http://myanimelist.net/manga/10541/Arcana_Heart

Other Wikis

 * Arcana Heart