Detective Squad Chief Choi is set for a promotion. He has a party with his co-workers to celebrate, but, on the way home, a crime occurs and he accidentally commits murder. Because of his promotion, he decides to cover up the crime. The next morning, TV news reveals a body is hanging from a crane at a construction site. Choi is shocked because the body hanging is the person he killed last night. He takes charge of the murder investigation.
On the front lines of the war, there is a little girl. Blond hair, blue eyes, and porcelain white skin, she commands her squad with lisping voice. Her name is Tanya Degurechaff. But in reality, she is one of Japan's most elite salarymen, reborn as a little girl after angering a mysterious being who calls himself God. This little girl, who prioritizes efficiency and her own career over anything else, will become the most dangerous being amongst the sorcerers of the imperial army.