A magic book from scratch

Year 526 of the Church Calendar——. Witches exist in the world, and "magic" has become popular. However, the world does not yet know the existence of "magic". In such an era, there were still half-human, half-animal mercenaries who were contemptuously called "orcs". He was coveted by witches every day, and he dreamed of becoming a human, until a beautiful witch he met in the forest one day changed his fate. "——Do you want to turn back into a human? Then mercenary, become my guard!" The witch who calls herself Zero said that her [Book of Zero], a magic book that may even destroy the world if used improperly, was stolen by someone unknown, and she is now on a journey to find this book. The mercenary accepted the request to become the guardian of the witch he hated most on the condition that Zero use his power to help him become a human. People's thoughts began to swirl around the forbidden magic book... The ultimate fantasy drama brought about by a noble witch and a gentle orc.