This is the social RPG for smartphones which personified a character of the fantasy world such as a dragon and the fairy. They start the broadcast of the TV anime with the release of this. Anime studio GONZO deals with the production of this
Anime official site is here.
GREE made anime of their social game in the past.
Social game anime of GREE
GREE propels the character business of their social games
However, they had the results of the hit as the social game. However, "Zettai Bouei Leviathan" is a complete new works. There is not the popularity beforehand. This is a big GAME for GREE.