ヨルムンガンド (Series) favorite_border

Volume 1 Introduction: Yona, a boy who hates the weapons that killed his parents, joins the private army of arms dealer Coco. Coco is trading weapons with the military of a certain country, and is targeted by forces that want to prevent him from doing so. But Yona, who has been accompanying Coco, fights back with the weapon he hates...