A Chinese Taoist monk, He Xun, has his soul reincarnated into the body of a Japanese high school boy. He Xun, now Tanaka Mamori, uses his cultivation powers to ward off demons. Among his encounters, a Demon Fox known as Miyazawa Momoko, suffers a humiliating defeat at his hand. Determined to get back at him, Miyazawa transforms into a school girl, and attends classes with Tanaka in an attempt to seduce him.