Ashiya Hokuto is a current high school student and former onmyoji. It's been three months since he started dating his favorite girl, Chika. Hokuto's smooth sailing days of youth take a sudden turn when he reunites with his long-lost twin brother, Nanto! "I want you to help me with my work instead of my master who has gone missing." Guided by Nanto, Hokuto returns to Onmyodo to hunt demons and exorcise curses! Head north. The target is a mysterious black fox. A journey to challenge the fate of the "Twin Onmyoji" begins!!