"Midnight Occult Civil Servants" is a supernatural anime series set in modern-day Tokyo, where the boundaries between the human world and the Otherside—a realm inhabited by supernatural beings—are increasingly blurred. The story centers on Arata Miyako, a young man assigned to the Shinjuku Ward's Nocturnal Community Relations Division, a government office tasked with resolving disputes and maintaining harmony between humans and supernatural entities known as "Anothers." Arata, who initially lacks any special abilities, discovers he possesses the rare gift of understanding and communicating with Anothers, a skill that proves invaluable in his role.

The narrative unfolds through episodic cases, each involving interactions with various Anothers, ranging from mischievous spirits to powerful deities. Arata is joined by his colleagues, Theo Himezuka, a stoic and knowledgeable officer with a deep understanding of Anothers, and Kyouichi Sakaki, a pragmatic and experienced supervisor. Together, they navigate the complexities of mediating between humans and Anothers, often uncovering deeper mysteries tied to the Otherside and its connection to the human world.

Key plot points include Arata's growing understanding of his unique ability, which is revealed to be tied to a mysterious figure from his childhood. As the series progresses, the team encounters increasingly significant threats, including rogue Anothers and ancient entities with the potential to disrupt the balance between worlds. The stakes escalate when Arata learns of a prophecy involving the "Key to the Otherside," a powerful artifact that could either unite or destroy both realms. This discovery leads to a climactic confrontation that tests the team's resolve and challenges their understanding of coexistence.

The series explores themes of coexistence, cultural differences, and the importance of communication, using the interactions between humans and Anothers as a metaphor for broader societal issues. The characters' development is intertwined with their encounters with Anothers, as they learn to navigate their own biases and preconceptions. Arata's journey, in particular, highlights the importance of empathy and understanding in bridging divides, both literal and metaphorical. The anime balances episodic storytelling with an overarching narrative, creating a cohesive and engaging exploration of its supernatural premise.