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Baikoku Kikan
También conocida como: Az opera királynője, The Queen of the Opera, Королева оперы, 卖国机关, 売国機関, 매국기관 · 売国機関 · Treason Agency: The Queen of the Opera · The Queen of the Opera · 매국기관 · Treason Agency · Королева оперы · 卖国机关
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.