In 1923, Imperial Japanese Navy Ensign Ichiro Ogami is transferred to the Imperial Combat Revue, a secret combat unit based in Tokyo. Meanwhile, swordswoman Sakura Shinguji arrives from Sendai as the Assault Force's latest recruit and meets Ogami at Ueno Park. Traveling to the Grand Imperial Theater together, Ogami meets the team's main actresses: Sumire Kanzaki, Maria Tachibana, Iris Chateaubriand, Kanna Kirishima, and Kohran Ri. The theater's manager Ikki Yoneda tells Ogami he has been assigned as an usher. Initially bemused and hurt by his assignment, it turns out to be a bluff to decide his worth. The Imperial Combat Revue also functions as a theater troupe called the Imperial Revue. Central to the unit is the Flower Division, the Imperial Revue's main actresses, who use their spirit powers to defend Tokyo against demon attacks using steam-powered armor called Kobu. The game is told in episodic format, and the story has a bit of a cheesy, Saturday Morning Cartoon vibe. A theater troupe living a double life, where they're a performance troupe, acting out stage plays one moment, and when demons attack, they spring into action, fighting off enemies in their Kobu robots. complete with the characters posing before and after a battle, and after each chapter the game gives you an episode preview of the next chapter.