Oscar was reborn in the ancient world 15,000 years ago, when human civilization had just been born and humans had just mastered the skills of cultivation and had just learned about refining medicine, alchemy, runes and magic circles. The continent was in turmoil, alien races were strong, demons were rampant, monsters were everywhere, and the status of the human race was precarious! This is an ancient and barbaric world, and it is also a passionate and shocking story!