Instructor of the Sky Wizards Academy
Before Fireteam E601 can congratulate themselves for the decisive victory, the mysterious assailant strikes again. Now, Kanata's students - current and former - must work together to defeat this terrible foe.
Aired 24/09/2015EP 12 - Instructor of the Sky Wizards Academy

Sky Wizards Academy
The story is set in a world where humanity, driven off the land by the threat of magical armored insects, now live in aerial floating cities. Thus wizards — aerial combat mages who fight the insects with magical powers — came into being.
Kanata Age (Eiji) is a young man who lives on the floating wizard academy city of "Misutogan." He was once celebrated as the "Black Master Swordsman," the elite ace of the S128 special team. However, he is now despised as the "traitor of the special team." One day, he is assigned as the instructor of E601, a team that has suffered 10 consecutive defeats. E601 has three girls — Misora Whitale, Lecty Eisenach, and Rico Flamel — with one or two peculiar quirks.
(Source: Anime News Network)