That's not necessarily true. Even now there are human groups who are part of larger countries who still keep their own traditions and rules, even self governance.
I 100% agree with big bro, I can see football players punching their balls if necessary to cheat that "pain number" system. I mean, there's was a goalkeeper who cut himself in the forehead to fake being attacked.
@Ironclad I think this was an introduction to the two sisters' conflict. They get along better now, but this is just a first step. I expect their relationship is going to be improved later on.
@stef I think Himari wasn't the one who put Mizore's head in her bag. I actually think it was Mizore herself who did it. She took Himari's homework out to put her head, that's why Himari is surprised (she looked surprised on the last chapter too).