In a world plagued by ogres who devour humans and fear of horned individuals akin to ogres, a horned being named Shien, also known as Onikirimaru, dedicates himself to hunting these monstrous creatures. Meanwhile, Yura, a young horned child reeling from the loss of his parents to an ogre, crosses paths with Shien. Their fateful encounter sets the stage for a unique bond to form in this perilous age of uncertainty and danger.