From what I found out, there’s a manga adaptation of the series being done by Shirometsukusa, the same person who also did one of the stories in Fate/stay night’s anthologies.
It is being serialized in Monthly Comic Alive, a magazine published by MediaFactory since February 2009. The manga is part of the MediaMix series of the magazine.
I also have to mention that the manga shares the same name as the Playstation 3 version of the video game, Tears to Tiara ~Kakan no Daichi~ (Tears to Tiara: Earth’s Wreath).
Just a note, for the PC version, the title is still written alphabets, while the anime and manga title uses katakana for the pronunciation of Tears to Tiara.
The first chapter began serializing in Monthly Comic Alive‘s 4th issue on February 27th. The second chapter being the latest was in its 5th issue which was also released on March 27th. The third chapter has also been confirmed being in the next issue.
Click to enlarge.
The cover for its upcoming issue will feature (of course!) Tears to Tiara: Earth’s Wreath along with Phantom ~requiem for the phantom~ and Queen’s Blade. This is to commemorate these anime adaptations.
At Aquaplus’ Tears to Tiara site, there are 2 short movies up for download. The first option is a for a smaller frame, thus smaller file size (800×450). The bigger frame is 1280×780.
Watch out for more updates!