By multiple male leads, do you mean those guys pairing off on their own? If so, yes, that'll happen for some guys if you don't romance them yourself. I have a few pairings planned already, and more may come up as I write. I don't think anyone has guessed the ones I already decided on, but they'll make sense if they happen.
If you mean poly relationships including Connor, no, primarily because of how complex it is to track relationships when there are so many choices.
You will definitely see more of the other frat boys, don't worry 😉