Just finished the game. Like others have said "Come for the tits, stay for the story." and I'm really glad I stayed.
The writing is awesome. All of the girls have real, unique personalities with their own quirks, skills, flaws and traumas. They all feel like real people.
The last... act, for lack of a spoiler-free way of saying it, has several really heartfelt conversations that really pulled me in and might have even had me falling for the girls. Robin and Mia in particular. They're my kind of gals.
If I had one complaint about the game, it would be that a few too many of those heartfelt moments turn into fuckfests a bit too abruptly. By that point in the story, I was in a "I don't want to be horny. I want to be happy." mood. If there was more of a separation between the touchy-feely emotional stuff and the, ahem, touchy-feely physical stuff, it wouldn't have been much of a problem.
So yeah, good game. I got the game for free, and I normally have a rule about never paying for something I can get for free. But I think I might just have to break that rule; I think the dev's earned my 15 dollars.