~ Anime News Network.Plot Summary: Fifteen years in the future, by high-level scientific power, a violent battle takes place between La’cryma, that protects humanity, and Shangri-La, that plans the annihilation of all space-time. The key to stopping Shangri-La’s invasion is a mysterious object known as “the Dragon’s Torque.” A group known as the Dragon Calvary is being sent through space and time to find it. In the present, twelve-year old Haruka and her friend Yuu are contemplating running away from home when they meet a member of the Dragon Calvary named Karasu (Crow). He believes that Haruka has the Dragon's Torque and claims to be Yuu from fifteen years in the future.
You should be watching this its now my acclaimed best anime of the season possible year. WATCH IT, WATCH IT, WATCH IT.