I think I'm a bit late, but I just finished this game and really liked the story. Somehow, the fact that these characters have a whole backstory unknown to the player wasn't particularly impactful which is a good thing, and the writing was good enough to make up for the lack of knowledge one might have about these adorable psychopaths.
However, after getting all the endings, I was certainly glad that the game was interesting enough to get me to finish it in its entirety but alas, I was also very disappointed at the lack of a blowjob scene, especially considering the act itself had been mentioned multiple times during dialogue! Can't win them all I guess, but I still believe it's a missed opportunity. I might be a little biased however, since this is really the one and only thing I expect from a game that is erotic in nature aside from polished writing.