I think you are indeed remembering this game, but the numbers are slightly off since I think Connor got added to that tally. I'm pretty sure I must have said the wrong number at some point because I almost did it again when writing this response!
So to clarify: There are 16 main guys in total, not including the PC. Of those 16 guys, 8 you can romance and/or have a fuck buddy relationship with, 1 is romance only, and 7 are hookup only.
All 16 guys have been introduced as of the most recent public release. In alphabetical order:
Alex (streamer)
Asher (musician)
Dominic (British voice actor)
Evan (classmate)
Griffin (bartender)
Isaiah (dancer)
Julian (frat guy)
Leo (best friend's roommate)
Mafia (muscly band member)
Marco (roommate)
Matt (best friend)
NC17 (slender band member)
Owen (hippie)
Riley (RA)
Tomas (quiet professor)
Will (mentor professor)
I'll add that I've been making some new minor characters for an upcoming release, and after seeing how their character designs came out I may very well add more hookups throughout the game so I have an excuse to get them naked ;)