Akashic Records of Bastard Magic Instructor

Sistine Fibel and her best friend Rumia Tingel are students at a prestigious magical academy, where Sistine hopes to be trained by the best there is in order to unravel the secrets of the mysterious Sky Castle per her grandfather's last wish. When her favorite instructor suddenly retires, his replacement, Glenn Radars, is anything but what Sistine had hoped for, as he appears lazy, incompetent, and not that skilled at magic. However, following an attack on their school, Sistine quickly realizes that Glenn's unorthodox teaching methods may have more merit than she originally assumed.