I don't mind the sorority girls having sex really, since it's not like we're in a NTR scenario here. The girls have had fun in the past but it's not like you can just bang anyone, except Katy I guess but that's coz she finds you hot. That being said, the blowjob competition was a bit weird. But everything else has been pretty much perfect.
Reina has put her wild past behind her, June has been with some people but she doesn't sleep around with just anyone and it's clear that she's putting her career first and only wants you rn, the other sorority girls are basically side chicks.
I'd love to see more of DK btw. For now, DK, Kindra, Reina and June are the top 4.
And Cassandra omg, what an antagonist. While we will likely get more scenes explaining her motivations and why she is the way she is, I don't think she'll ever turn into a sympathetic figure. But she serves her purpose extremely well, easily one of the most detestable villains in an adult VN I've seen.