In the Spring of 1919 (Taisho-8), young Shinguuji Sakura diligently practices kendo in her home town of Sendai... Meanwhile, the imperial capital is still recovering from the damage made during the last Demon War which ended one year ago. Count Hanakouji and Yoneda plan for the formation of an anti-demon attack force - the Imperial Floral Assault Unit (Teigeki)... Within Kanzaki Heavy Industry of Kawasaki, secret construction is under way for the armament and weaponry of the Teigeki. These include the first generation of steam mecha unit \"Oubu\", the airship \"Shougeimaru\" (Flying Whale) and the underground bullet train \"Gouraigou\" (Rumbling Thunder). The operation of the Oubu requires a pilot with very good control of Ryoushiryoku (psychic power), which is very difficult to find. Therefore the grand-daughter of the president of Kanzaki Heavy Industry, Sumire, volunteers for the test-drive of the Oubu... Meanwhile, Ayame is seaching all over the world for other candidates with exceptional psychic power: Kouran in Shanghai, Maria in New York, Kanna in Hong Kong...