In a fantastical realm rife with tension among humans, demihumans, and oni, Princess Saltorine, known as Sally, embarks on a quest to locate Mikoto Kibitsu. Throughout her journey, Sally uncovers hidden truths about her heritage, including the oni's devastating power that threatens all life. Endowed with a unique mark resembling a peach, Sally gains extraordinary abilities to combat formidable oni effortlessly. Despite her strength, Sally advocates for unity among all races, envisioning a harmonious future. Conversely, Mikoto, equally gifted but with a more sinister agenda, aims to eradicate all oni without mercy. As Sally and Mikoto clash, their powers become pivotal in determining the fate of coexistence or obliteration among the factions.