A near future. On Earth, from nowhere appeared "Dark Earth" – a plague that slowly spreads in all directions. People who end up on its territory die and replenish the ranks of the enemy – they assimilate into a crystal-like metal and become "Reborn." Moreover, this "Dark Earth" is protected by its guardians, the "Dead," huge black mules. It is said that if you hear the song of a dead man, you will die within nine days by mysterious death. (Hello "Bell") With all this plague, a newly forged squad of young geniuses will fight in their regions. (UNEXPECTED, NOT ALL OF THEM ARE STUDENTS)
Satelight 
C2C Japan