"At the end of the twentieth century, humanity succeeded in the theorization of 'magic', creating a limitless energy resource. Yet, they could not bring an end to the conflict between themselves."

"Sol Badguy: He's joined the specialized anti-Gear elite troops known as the Sacred Order of Holy Knights after being recruited by their leader, Kliff Underson. Due to his personality, he goes solo even within the group." 

"One day, from the midst of the supposedly obedient Gears, came forth a single Gear who possessed great combat ability and a strong will, calling herself 'JUSTICE'. With gears all over the world by her side, she declared war on humanity."