I guess I have the answer I was searching for before even posting. I wondered why no choice seemed to have any effect (the pill, the kiss, or between ruby/martin/ryan (despite dialogues clearly stating stuff will happen with ryan)).
Well I still liked this ending, mainly because of the "party" (I was like omg it's real), even if I admit it was a bit too much to be credible (all in the same bed lol). Well, it was hot anyway, that's all I ask.
A bit sad we probably won't see Ruby anymore (unless there's a way to win in another route ? I doubt it but well), her model was lovely and I liked how she was sexually more open than Alice. She was like another Elena for Alice but in the model world, and a bit prettier.
It wasn't as bad as I imagined after reading some complaints here. Well some parts were boring (honestly I just closed Georgina path, the dialogues were always the same I couldn't bear it anymore), but overall it was OK.
Btw there's a bug: if you're in Georgina's path, you don't get to see a scene in which Ruby and Alice watch some porn together. Each time I had the scene with Georgina, that other scene didn't appear but the dialogues continue as if the scene happened when D decides to masturbate.