What if there was "Lands of Giants"? What would life be like in such lands? It would be crazy to live there. But there's a special group called the Giant Runners. Crazy is what they do best, and Takashi Komuro has enough crazy in him to wander into the Lands of the Giants alongside the Giant Runners. Living in the Lands of the Giants was not easy. It brings a new adventure everyday, and there's so much to learn. But what if the young Takashi could tame a Giantess through becoming a so-called "Giantess Tamer." This is his story