Baikoku Kikan

In the early 20th century, a small republic found itself stuck between a kingdom and an empire—both of whom wanted to manipulate the republic to suit their own needs.
In order to protect itself from both sides of the conflict, the republic created a small group of soldiers whose job it is to suppress revolution and dissent in any way possible. This is the story of the Opera House.

From the author of Youjo Senki.