Well if theyre immature enough not to differentiate reality from fiction they shouldnt even be reading this kind of mangas
Even a mature person can do that,brain is still a brain and also this manga isn't limited for people. Just making you know that you can be a grown up person but you still can be immature and that the world isn't full of clones that have the same personality.
Thing is in a lot of countries high school is not compulsatory. If I remember correctly Japan is one of them. People drop out or just do go and get jobs instead all the time. That's part of why is shows up in Japanese manga so much.
Thats why i said immature
Not underaged
You know...The dropping out from school thing...People should start removing that from their stories since that might really affect someone and they might do the same and they will not get the same ending 99.9%