Era's of Oni

Plot: In a world where Oni exist, some humans could befriend or enslave the Oni after gaining the king of Oni's trust. Other humans hated the idea of having an Oni live amongst them. That is why the kingdom of Okemia, the human-Oni kingdom, went to war with the human-only kingdoms. However, an Oni is born, a special Oni. Her name is Akashi. All she ever wanted was to find peace between humans and Oni. She wanted a world where they could all live as one without fighting. This is how Akashi made a new era of Oni-the era of Oni peace.