When beings from another dimension declare war on humanity, the world establishes an academy known as “Genetics” to train elite female warriors called Pandora — fighters who wield special weapons and armor. Kazuya Aoi enrolls in the academy to honor a promise he made to his late sister, a legendary graduate who died in battle. At Genetics, he encounters Bridgette L. Satellizer, a second-year student feared and admired as “The Untouchable Queen” for her cold personality and flawless battle record. But when Kazuya enters her life, he begins to break through her walls — and slowly changes her world forever.