Well for me the game is broken, unfortunately. I played for several hours today, got my stats up very high (50+ each) and Bree/Sasha got stuck on romance/kink not going up. I used cheats, to force them up and then all I could do was kiss and go on dates, but nothing ever happened from there, so I figured I must have made some kind of decision wrong early on.
So I started a new game, and now whenever I ask for phone numbers, they never appear in the phone. Using cheats I can get them back up to where I was in the last save, in terms of progress, but still can't get sex scenes. And the number never appears in my phone.
I like the art style, and I know there is supposed to be sex in the version I have, but I can't get to it. There is too much grinding and I have no idea how to progress as taking out for dates, and sending various texts and giving compliments/gifts aren't getting me anywhere. Its a shame as I was starting to like it, but now I want nothing to do with this tease of a game. Sure wish there was a gallery or an image rip of stuff so that I could at least see what I would have acquired if I managed to get the game to work.
If you read the walkthrough, you'll notice that Bree, Sasha & Samantha all have a few events that need to be done before you can go all the way on a date. To do those, you need a certain amount of stats and then the right place & time. Every other girl has some events as well, but not all of them currently have end of date sex content, there's a list in the walkthrough, but if I remember correctly : Bree, Sasha, Samantha (maybe only once, depending on choice, not sure), Audrey, Kleio, Lexi, Anna. Not sure if anyone else was added in this latest patch yet.
And if you just want to avoid the grinding, there's that code mentioned earlier, which pretty much allows you to maximise girl stats, keep your own at a safe level forever, get money and maximise all date progress , so you don't actually have to grind, other than purchasing items or if you want to.
As for the numbers not appearing, I honestly have never heard of that (not that i've actually read through this 161 page thread a lot, but hey). If you have the required stats and talked to the girl, and then checked in contacts (maybe you mistakenly checked calendar) then it should work.