The story would involve a university, which there is only one of on Earth. In the story, I'd only be focusing on about four or five of the students and I can decided on nationalities for them. I live in the US so I'm more comfortable writing about characters who have a past there, but at the same time, it seems unrealistic to have all of them being from the US. On the other hand, I feel like it just seems like I'm trying too hard to get characters of different nationalities if I make each of them from a different country.
I've probably just been thinking about this too hard, but if anyone has any opinions, I'd love to hear them.