Humans loved war. For untold millenia, they had fought against each other; some fought for land, some for power, and some for glory. But it all came to a halt when a threat far greater than their own joined their battles. The """"XENOS"""". For a hundred years, they fought these beings from another world. Their ability for destruction has made them the true lords of war. And it was a miracle that they survived. To prevent such tragedies from happening again, the younger generation who were born with the power to control the Spirits, were trained to use their abilities for the sake of mankind. But in reality, they got dragged in the endless cycle of bloodshed.