Himon Island is where the legend of the cursed ancient evil princess and immortal princess lies. The moment Mikoto, a shrine maiden on the island, steps into the forbidden forest, an unprecedented earthquake revives the curse. A strange monster, Hidarugami, eats and kills people one after another, and Japan falls into chaos. However, it turns out that the key to sealing her curse is sleeping inside Mikoto’s body...! ? The battle between Mikoto and the lewd Self-Defense Force officer Tatsumi against the cursed immortal princess begins!