Preparations for a new offensive against the Neuroi—a mysterious race of alien invaders—are well underway. The objective is securing Berlin, the capital city of the Empire of Karlsland, which is necessary for wiping out the Neuroi threat from Europe. However, as the enemy is capable of adapting to the battlefield on a daily basis, the allied forces and the current state of Striker technology might not be enough to achieve a victory. Meanwhile, Yoshika Miyafuji, a Witch from Fuso, continues her medical studies in Lausanne. Having recovered from a recent incident that deprived her of magical power, she is eager to assist in the war effort. The call to arms soon arrives and the scattered witches of the 501st Joint Fighter Wing must be gathered once again for a final push against the enemy. [Written by MAL Rewrite]

The story follows the school life of the three girls, Yuzuko, Yukari, and Yui, who join their high school's Data Processing Club. The odd friendship between the three make for wacky humor in even the most mundane of events.

It began in 1945, at the end of the Pacific War. Alien invaders filled the earth's Skies, and mankind was forced to confront an unprecedented threat. For the first time in human history, people of all cultures came together under one banner. This war has now been raging for over fifty years. Countless lives have been lost, and the Japanese military is now forced to rely on young people such as Atsushi Hayami and his high school class, also known as Unit 5121. This new generation fearlessly struggles on with the aid of the HWT humanoid combat machines and the devastating PBE bomb. (Source: Media Blasters)

After suffering from a shoulder injury, shy first-year university student Haruki Bandou gladly takes the opportunity to give up judo, failing to find happiness in the sport regardless of his family owning a dojo. He did not expect, however, that his best friend Kazuma Hashimoto would also decide to leave their university's judo club at the same time as him. Despite Haruki's protests, Kazuma already has plans for a new and revolutionary activity: a cheerleading team made up of only men. Although heavily reluctant, Haruki ends up helping his friend set up the team. Through sheer determination, and with support from their newfound club members, Haruki and Kazuma persist in founding the Breakers, the first ever all-male cheerleading team of Meishiin University, slowly making history in spite of the feminine tag attached to the sport of cheerleading and the prejudices, physical challenges, and self-doubts that inevitably follow. [Written by MAL Rewrite]