Police officer Akira Nishikiori investigates uncanny cases for the Cabinet Intelligence and Research Office, initially skeptical of magic's existence. His role designates him the official government liaison for exorcist sisters Shōko and Maiko Ōgi, coordinating their missions under state oversight. Nishikiori acts as their bodyguard in the field, providing physical protection and logistical support against spiritual threats.

Continuous exposure to the supernatural through the Ōgi family gradually shifts his skepticism into acceptance. Within the team, he serves as the primary physical combatant against hostile entities, a role marked by occasional blunt or tactless behavior. He partners with fellow exorcist Tsukasa Kenmochi during missions, their dynamic blending professional coordination with moments of friction. Across multiple cases, Nishikiori evolves from skeptic into a committed protector of the Ōgi sisters.