Set in a world of fractured relations between humans, demihumans, and oni, this fantasy series centers on Princess Sally, who carries a mysterious peach-marked power and a firm belief that peace between the three factions is possible. Her search for Mikoto Kibitsu leads her into confrontations that challenge everything her sheltered upbringing kept hidden from her. The tension between Sally's idealism and Mikoto's ruthless vendetta against all oni gives the series a compelling moral edge that keeps viewers invested.