Shichinin no Maken-hime to Zero no Kishidan

Nacht, a red-haired boy, suddenly appeared at the Kielmaul Magic Academy, which is ruled by the Seven Princesses Of The Magical Swords. And he immediately started making enemies as soon as he entered the school. The goal of this fearless boy is to obtain all the magic swords and revive the legendary Knights of the Order. The battle between Nacht and the seven sword-princesses will involve the entire school, Nacht's legendary magical artifacts, the Knights of the Flying Islands, and the demons that roam the continent.

(Source: MF Bunko, translated)