These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Big Lipped Alligator Moment: Arf ends up eating some of Chamo's magic chocolates. Then she proceeds to act like a drugged-out squirrel and dry hump Zafira. Apart from one aside mention in the next chapter, the incident and the chocolates are never mentioned again. Thank God.
Fridge Brilliance: None of the girls recognize the Universal Greeting. It actually sounds rather differently, though somewhat similarly, in Japanese.
What an Idiot: Negi trains himself to unconsciousness again, and this time there's no Konoka around to heal him...