​In the late 21st century, Earth faces a relentless alien invasion. Desperate for a solution, humanity discovers a powerful weapon in a hidden Japanese cave. Awakened from cryostasis, the young master Ryuusei leads mankind to victory. As the newly-appointed commander of Earth’s Defence Force, Ryuusei relies on his unique ability to materialize objects with his imagination. To safeguard against his potential incapacitation, the force enlists a group of courageous girls who possess the potential to fight alongside him. Faced with personal motivations, each girl joins Ryuusei in the formation of the elite group known as the “Blade Briders.” Together, they stand as the last line of defense against the return of the alien invaders, protecting the future of humanity.​