When a demon whisks Akane Motomiya and her companions, Tenma and Shimon, into a parallel realm, Akane is anointed as the Priestess of the Dragon God. Entrusted with the crucial task of thwarting the demon threat, she grapples with the opposing desires of the world's inhabitants and the malevolent demons seeking to exploit her powers. Fortuitously, Akane finds solace in the Hachiyou, a band of eight formidable men bound by oath to safeguard the Dragon Priestess.