
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.
Королева оперы / 売国機関 / 매국기관 / 卖国机关 / The Queen of the Opera / Baikoku Kikan / Az opera királynője