“The most original combination in history—human and ogre blood unite!” Leon, a half-blood born between a human and an ogre. However, what awaits this half-blood upon returning to the world is nothing but exploitation and betrayal by humans. Leon comes to despise these humans and vows revenge. Leon, who had always been powerless and suffered because of it, encounters a fateful opportunity: a chance to take revenge against humans who have mistreated him.