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.
YMMV: Bokurano
Anvilicious: In the manga only: Kana Ushiro, Jun Ushiro, and Kirie Yousuke each spend time lecturing the reader that people should care more about everyone else in the world, even if they aren't the "main characters" of a story.
Also in the manga: there are also Take Thats towards America along these lines; despite American characters rarely being depicted, characters in the manga show disgust for a perceived American selfishness whenever actions by the United States are mentioned.
Woolseyism: The official English translation of the manga explains the name "Zearth" as a case of Xtreme Kool Letterz rather than delving into a lengthy explanation of the mechanics of the Japanese language that can put a "z" at the start of "The Earth."
Moral Event Horizon: Mr Hatagai goes straight over this with what he does to poor Chizu in the manga. So much that he had to be seriously toned down in the anime.
Koyemshi threatening to kill Ushiro to force Kana to join the game. Fortunately, Jun himself out-gambits him with the help of Youko.
And until the last fight in the manga we only had pilots destroying worlds indirectly, by defeating the enemies' mecha. NOW MEET USHIRO, forced to kill 'EVERYONE IN THAT UNIVERSE to save ours..
