But isn't it weird we don't see none of his friends since he's the most popular guy on the campus right now
First, he doesn't have that many friends at all, apart from the Diks. A private life outside of school does not seem to exist at all. I don't know how realistic that is. This type of school does not even exist in germany. What is similar with us is studying
Next, the game is primarily focused on events that can be seen through the eyes of the MC. It's a miracle that there are other scenes. That's why we for example never really see other men sexually active, even though they are. I think if we could see everything that could theoretically be seen where the MC is not there, the game would have been twice as big. That would give the game, which is already very good, a little more realism.
But certain people would then run storm again, at latest when one of girls doesn't have sex with the MC. I think it's a good thing that it's done the way it is.