Nobuhisa Terado

太正十五年、帝都・東京は西洋文化と日本文化が入り交じり、街には蒸気電話、蒸気自転車、地下には蒸気鉄道網が敷設され、独特の文化が築き上げられていた。 しかし、この一見華やかな舞台の裏側には、“降魔”と呼ばれる異形の怪物が跋扈する闇の世界が潜んでいた・・・通常の軍隊、警察では到底手に負えないこれらの怪物から帝都を防衛すべく、闇と戦う秘密部隊「帝国華撃団」が組織された。だが、驚くべきことに、隊長をのぞいた全てのメンバーは花もはじらう乙女たちであった。彼女たちは、昼は帝都のスタア、「帝国歌劇団」として大帝国劇場で華やかに舞い踊り、一度、帝都に危機が迫ると、「霊子甲冑（りょうしかっちゅう）」に身を包み、「帝国華撃団」として華麗に戦う戦士たちである。

The battle for the Capital city of Kyo rages as warring political factions vie for power against hereditary rulers. After the murder of her parents at the hands of her seditious uncle, a young girl named Kintoki flees to the mountains to lead a harsh life; she is renamed Kai Doh Maru by the local villagers. Rescued by Raiko, the Captain of 'The Four Knights' - honorable defenders who protect the peace of the city, she is raised within their group as a boy. Living among the Knights, she learns the practices of martial arts and develops into a skillful samurai, becoming a permanent member of their team. Now, as a young woman of seventeen, she begins to discover new feelings of passion and love for Raiko... but she also discovers that these new emotions cause a storm of jealousy and rage in another woman linked to her past.