Lime-iro Senkitan

Set in the 37th year of the Meiji Era (1904) during the Russo-Japanese War, the Japanese military deploys a unique secret weapon to assault the Russian stronghold at Port Arthur: the Amanohara, a flying vessel powered by a benevolent spirit. Amidst this conflict, Shintaro Umakai, a former Japanese diplomat who had been serving Russia, defects and travels to Sapporo to take up a teaching position at a girls' academy. However, this institution is far from ordinary; it is housed aboard the Amanohara itself, and its students comprise the Raimu Unit, five young women gifted with the ability to summon powerful entities for combat. Shintaro assumes the dual role of instructor and battlefield commander for these five girls. Together, they embark on an unconventional and highly erotic journey as he guides them in overcoming their personal weaknesses and preparing for the decisive battle at Port Arthur. Throughout their training, they must also unravel the mysteries behind the opposing Russian Spiritual Corps, a supernatural enemy force that includes one member with whom Shintaro shares a painful past.