Since ancient times, shrine maidens who wield swords have been exorcising "aratama," strange existences that threaten the human world. These young women who wear school uniforms and a sword are called "Toji," and they serve as an official unit within the police force as a "special religious service police squad." The government authorizes the Toji to wear swords and serve as government officials, and the government has set up five schools throughout the country for the girls to attend. In the spring, the five schools send their best Toji to compete in a tournament. As the tournament comes closer, all of the representatives rigorously train themselves in order to get stronger and improve their skills.

In Raja, a small country located to the west of Tempest. Rimuru and his companions get involved in a long-running conspiracy that swirls around the mysterious power of the queen. Rimuru and his commander Benimaru also encounter another ogre survivor named Hiiro, a man that used to be the brother of Benimaru.

Marina, the most beautiful mermaid in the royal Merman family, is curious about the human world. One day, she sees a handsome prince on a boat. Suddenly, a storm comes up, throwing him into the sea. Marina saves her handsome prince and guides him to the shore. Marina falls deeply in love and desperately wants to become a human. Despite the hazards, she is willing to risk it all for love.

Limited edition OVA episode of Miss Monochrome.