10 years ago, [Anomalies] suddenly appeared throughout the world. These [Anomalies] are carbon copies of beasts that exist in every mythology from across the globe. Specialists were gathered from from far and wide to deal with this new threat…These individuals are known as [Exorcists]. Despite growing up in a family full of these [Exorcists], a young man named Tōjurō just wants to live an ordinary life. During his latest assignment, Tōjurō encounters [Behemoth], a well-known Mythical Beast. After waging battle, the [Anomaly] known as Behemoth, uncharacteristically changes into the form of a beautiful woman. But why do they both seem to have matching engagement rings on? A young man who hunts strange monsters, and a woman who calls herself a [Divine Beast], their fateful encounter will spark a miracle!