Aiogara is a book series by author Kazuo Omura. It is a fantasy series taking place in the worldspace of Aiogara, a world home to humans, two types of elves, and the mythical Sinistrals. They focus on Auros, the newly appointed King of Eiran and of freed humans. Auros forms an unlikely alliance with the King of Sinistrals, a race he once was determined to wipe out, to fight against an unseen enemy that threatens everyone. Along the way he faces anger and fear from people, directed towards Sinistrals, elven slavers who wish to enslave the free segments of humanity, and the great conspiracy and betrayal of people he once considered allies.