This is like the 3rd time I see a picture of the boyfriend smoking being used as a threat to fuck the girl, what's so incredibly bad about smoking that makes these girls accept becoming a cum dumpster? Is it a thing in Japan to kick students out of school for smoking or something?
Well, NTR (il)logic aside, I'm guessing the tolerance for smoking, doing drugs (basically delinquent activity) is much more strict than Western countries.
At my high school, we even had a police officer patrolling the grounds yearly looking for that kind of stuff (mind you, its not a ghetto school, but the second best in Alberta).
I can only imagine how much stricter the rules would be in Eastern Asian countries.
Asian schools have much more discretion to impose punishments on students and parents are much more tolerant of it. Stuff like smoking, dying your hair or even using unauthorized transportation like a moped or car to commute to school are grounds for discipline, even if they're generally tolerated for adults, whereas in the US such restrictions can and have resulted in successful suits by parents alleging undue interference in their right to raise their children as they see fit.
Well, Japan is definitely stricter about smoking. But in fucking China, 70% school boys smoke, so you can't do like this to fuck a girl or they will call a lot of people to start a gang war to protect the girl. You see in some hentai anime, little illegal things can be used as to fuck a girl, I think it's unthinkable even in other asian countries. But well, it also shows Japan is more advanced in legal sense than other asian countries. In the end, forgive my English.