同名の人気ライトノベル シリーズを漫画化したものです。システィは魔法のスキルを磨くために魔法学校に通い、謎めいた天空城の謎を解き明かしたいと考えています。The manga of the popular Light Novel series of the same name: Sisti attends a magical academy to hone her skills in the magical arts, and hopes to solve the mystery of the enigmatic Sky Castle. After the retirement of her favorite teacher, the replacement, Glen, turns out to be a tardy, lazy, seemingly incompetent bastard of an instructor. How was it that Glen was hand-picked by the best magician in the academy!?