Former elite Sky Wizard Kanata is often called "Traitor". Fireteam E601 calls him "Pervert". As their new instructor, Kanata must show the three girls how to improve their rock-bottom grades, and hopefully get them to forget about his underwear.

Fireteam E601's first training session under instructor "Traitor" Kanata begins. Kanata quickly notices that each Sky Wizard has her own strengths, but their overwhelming weaknesses are much more pronounced.

Kanata, armed with knowledge of the weaknesses and strengths of each of his students, assigns special training exercises to Lecty and Misora. The two girls prepare for the toughest challenge, but get something beyond their expectations.

It's obvious that Misora has no chance of success with her current weapon, the Magic Cannon Sword. However, she is not willing to use a weapon more suited to her talents. Kanata must find out why.

Kanata is able to train Misora and Lecty to realize their strengths and weaknesses, bringing up their combat readiness. However, as a team, they are still incomplete - until Kanata convinces Rico to join, Fireteam E601 is a doomed as ever.

A surprise attack of Devil Beetles catches the Sky Wizards off guard, allowing a detachment to enter the city. The only Sky Wizards remaining in the city are those tasked with non-combat duties - Fireteam E601 is among them.