"Empire of the Ant" is a fantasy set in a country ruled by one queen ant. In this country, the ranks are divided according to the physical structure, and the “work ants” of the commoners who perform assigned jobs and the “army ants” who hold the important titles of the nation with the title of knight exist under the queen ant. The story begins when a commoner boy, Lulya, who works in a drugstore while being sniffed, is imprisoned in a castle prison for some reason.