*A Consummate Soldier Faces His Toughest Battle Yet: Attending an All-Girls School!* In the near future, Earth has been invaded by monsters called giju from another world, forcing humanity into a never-ending war for survival. Conventional weapons are ineffective; the world’s only hope lies in the Valkyrie Dresses—suits of powered battle armor with extraordinary combat abilities that can only be piloted by women. But that all changes one day, when a man named Ren Hifumi is suddenly transferred to the Third Academy Valkyrie training facility. Having survived an inhumane surgical procedure with a success rate of less than 10 percent, Ren is the test pilot for a new humanoid weapon that will change the very landscape of war… (Source: Yen Press)

Soldiers with a history of war were assigned to... the school of girls flying in the sky!? Near future - The earth was invaded by a monster from another world called "false beasts" and was forced into a never-ending defensive battle. Ordinary weapons rarely work, and the only thing that can compete with is the powered suit "Valkyrie Dress", which can only be handled by women equipped with mysterious powers. A man is assigned to the "Third Gakuen", an institution that nurtures and operates women who fight in such a steel dress. His name is \[one, two, three lotus\]. The experiment has never been successful so far, he was a test pilot of an anti-fake beastman-type weapon. *Note: \- The light novel was cancelled in order to be republished under a new title. \- Includes two extra chapters.*