The World of Summoning, Volume 1 (The World of Summoning #1-4)

Tokoyo was raised in the Fantasy District-not notable in and of itself, except for the fact that he's human. That fact alone gives him the ability to become a Summoner-one who can bring people and items from other worlds into his own. He's the pride of the district, as all those who live there were themselves summoned from another world. But when he emerges into the city of Tokyo, a human city where the summoned are discriminated against, he finds that being a Summoner isn't what he thought it was at all... and that, perhaps, his utopian vision of a world shared by human and summoned alike isn't shared by all... A brand-new adventure from the creator of Blood Lad!