“Exorcism” is the art of sending yokai who have wandered into the living world back into the underworld. One day Ashiya, a high school student meets Abeno, a morose-looking young man who runs an exorcism service. For various reasons Ashiya ends up working for Abeno as an assistance. And so the story of the exorcist duo Ashiya and Abeno, and the yokai they meet in their adventures, begins.