Kalego explains the dangers and responsibilities of familiars, all while remaining visibly irritated that he is currently bound as Iruma’s familiar.
The first half of the episode focuses on the "Familiar Instruction" class led by the strictly disciplined Naberius Kalego. Mairimashita! Iruma-kun Episode 11
The episode introduces the "Magical Apparatus Battler" and its eccentric leader, Ami Kirio, who takes an interest in Iruma. Reception Mairimashita! Iruma-kun Episode 11
Despite his annoyance, Kalego proves to be a dedicated teacher who acknowledges his students' progress when they perform well. 2. Battler Recruitment Mairimashita! Iruma-kun Episode 11
Older students aggressively "hunt" first-years to join their respective Battlers, creating a chaotic atmosphere similar to high school club recruitment in the human world.