​Ai and Mai Amatsu, the skilled twin sisters trained in their family’s spiritual traditions, are about to face a fierce battle against vile creatures from the demon beast world. Unbeknownst to them, their priestess abilities will prove to be crucial in protecting humankind from being led astray. These lecherous monsters hold a long-standing grudge against the Amatsu family for their historical role in keeping the demon beast world at bay. As if their mission wasn’t challenging enough, complications arise when their grandmother, Genshu, decides to prematurely assign them the duty of guarding Tenjin’s descendant—a young man with a perverted nature. In a dangerous clash between depravity, demons, and their unconventional charge, can Ai and Mai defend against the wicked forces that threaten their world?​