Mebius Dust

However, those who develop these special abilities can only survive in the presence of the "Mebius Dust" released by a giant crystal, and so they are forbidden from leaving the town of Shinkatsushika.Within Shinkatsushika, Rams Carrier children use their Rams to play a territory-conquering game to alleviate their boredom at being unable to leave town. High school student Araki along with his younger sister, Stella, and his childhood friend, Olga, form a team called "Polis Hopper" and throw themselves into the game. Their destinies begin to change when Professor Yuda, a researcher who studies Rams, asks them to participate in a certain experiment...(Source: Official Site)