Busou Shoujo Machiavellism / 武装少女マキャヴェリズム / 武装少女
The Private Aichi Symbiosis Academy was originally a high school for high-class girls. When it became co-ed, the girls, out of fear, asked to be permitted to bring weapons to school. When that was enforced, a five-member vigilante corps-like organization called the “Supreme Five Swords” was also formed.
「不存在支配的社會，從古至今都不曾出現！」
穿過校門後，映入眼簾的不可思議的花色國度，女學生極多於男性的花園。
少年納村不道，經歷事件後被強制轉學到這所學園，盼望被女孩子圍繞的校園生活，似乎跟實際體驗到的相距甚遠？
裡面的學生全部都是武裝少女，男性幾乎沒有生存空間，「私立愛生共生學園」，統治者是五名女劍士「天下五劍」,以及凌駕頂點女帝天羽斬斬。少年渴望進出校園的「自由」必須得到五劍印章，而這之前沒有任何人成功過。