The dynamic would be better if it was 2 and 2. Doesn't matter if it has romance or notIn all seriousness though, it's fine. As far as I know there's no actual romance in this story, so it doesn't really matter if it's 2 guys / 2 girls or 1 guy / 3 girls.
Nah she was doing the whole "Bishounen Shota" bit, I can understand how the MC was deceived.i mean yeah she is tomboyish without much, it's still pretty visible she is a girl X3