That title is quite the mouthful.

Sistine and Rumia are best friends attending the Magic Academy when they are greeted by an unruly new teacher Glenn Radars. The "Bastard Magic Instructor" is lazy, incompetent and really good at bullying his class especially Sistine of whom he dubs White Cat.
But when Rumia becomes a target for an evil organisation, Glenn reveals that he's way more talented than the students realise as he's a former assassin of the Imperial Court Mage Corps.
Rumia being a lost princess with a forbidden power is the real reason Glenn is teaching at the academy, along with Re=L, a child built mage who uses large swords and the backing of other Mage Corps members, Glenn has his work cut out as a teacher.
The plot is kind of erratic at best and schizophrenic at worst.
It's a magic school anime trying desperately to be Full Metal Alchemist even with some pretty gruesome scenes to try and raise the stakes and play up the drama, yet try and make the typical love hate tsundere banter between Glenn and Sistine work, it feels like it can't be it's own anime, it has to cobble together successful formulas to even function but so much gets missed and so many characters are redundant, you just end up being left with nothing to take you into any future season.
The dub uses a predictable cast that may as well be typecast at this point.
Final Verdict: A frustrating anime to watch as it tries in vain to use formulas from better anime but fails to even properly utilise them leaving you with nothing to chew on for any new season.