Beast Units: The Ten Thousand Races Labor Dispatch Company

In 2222, Earth was invaded by another world. Humanity fought back, and after nearly three billion people died, finally drove off the invaders. But the world was tainted by demonic energy, and spatial rifts began appearing from time to time in different places. As humanity continued fighting the alien races, Awakened began to emerge: powerful warriors, dashing swordsmen, and noble mages. Our protagonist, Yi Zhishuang, awakened as a Summoner, but there was nothing quite proper about the things he summoned.