Kuusen Madoushi Kouhosei no Kyoukan

Humanity resides in floating cities after being forced from the land by magical armored insects. Aerial combat mages, known as wizards, defend against these threats. Kanata Age, once an elite member of the S128 special team known as the "Black Master Swordsman," is now regarded as a traitor. He is assigned to train E601, a team that has lost ten consecutive battles. The team consists of three girls—Misora Whitale, Lecty Eisenach, and Rico Flamel—each with one or two unusual traits.