Well, for some players building relations is more important than meaningless sex, how strange it wouldn't sound. There are games where you f*ck everything which does not escape on a tree but they are really boring.
I actually like that this game doesn't have like "conventionaly* attractive characters that look like super model, cookie-cutter, superficial bimbos and are more grounded, I feel like that makes you focus on the relationship building aspect of the game rather than just a bunch of sex scenes put together with a sloppy excuse of a story, I agree that Ashley's sister is attractive but so far that's the only thing going for her, tho I reserve my judgement, I mean, we've only know her for a single episode and is not the best person ever, I still think that all of the girls are attractive in their own right, Kuneida is too god damn cute, I really like tattoos so Ashley is super hot for me, as for Sam well nothing beats a good MILF and Emily is the type of girl I'd actually go for in real life.