A masked person in a white cape battles with a demon girl over the possession of a young girl, but they are both forced to withdraw when Flower Division captain Seijuro Kamiyama intervenes. In order to protect the girl, Klara M. Ruzhkova, Seijuro takes her to Japan to be an apprentice member of the Imperial Combat Revue. He explains to the members of the Flower Division that Klara is the apparent sole survivor of the Moscow Combat Revue, who have gone missing after their airship was mysteriously shot down. However, Klara has lost her memories due to the crash, so there still no leads in the case...