The Japanese archipelago was ruled by someone and transformed into an empire called the "Great Japan Commander-in-Chief Empire". The power of the empire was not limited to the Japanese archipelago, but its threat was about to spread to the continent. An opponent to that power arose in the Republic of Manchukuo. that name as well! "Chodenji Gakuen" Tesla Memorial Republic High School Girls' High School (commonly known as Chodenji Gakuen), ostensibly a school that trains the brides of imperial soldiers, but in fact it is an anti-imperialist resistance organization that fights to protect Manchukuo from the threat of the empire. was. Armed with the anti-imperial symbol "Veliki", a gigantic automatic engine developed by the king of inventors, Dr. Tesla, he boldly confronts the empire.