Are we really still having characters thinking girls only get together in girls schools and those relationships stop after they graduate in the year of our lord 2020, I want to put a bullet in the brain of the class S genre
But generally relationship start from highschool doesn't hold up during college years. They may even broken up and find comfort at other women :v. This isn't really a class S piece by any stretch.
Well the main girl thinks it would be boys once they go to a mixed school. So yes that is a bit of a lame trope.