It's sad that the walkthrough only goes up to Act 2. I personally am only interested in the nicer path of the game, but I am a bit curious for at least an overview of what I'm missing. I would also like some idea of what risky choices might end up leading toward a happy harem setup without having to see the realistic backlash. I would like to cleanly break up with Emma or renegotiate the relationship contract early on, but I don't see a good spot to do that and she deserves better than this shit...
I just finished my first playthrough, which had a concept of "horny but honest and not an asshole, but also has difficulty gauging the correct distance to take from his female family members because his romantic and familial feelings are confused and intertwined," but at some point he starts taking automatic action on their paths that qualify as full-on cheating without ever properly addressing it... Suddenly kissing and getting sexual favours from his family members is no big deal even though zero character development on that front happened since he was feeling shitty about letting Lisa kiss him... I guess if you don't explicitly leave their paths it's assumed you're ok with cheating on Emma. Normally I would do a pure Emma run before considering trying for a limited harem, but honestly she doesn't interest me much compared to some of the others. Unfortunately, we don't get the chance of pushing her away early because she starts as the girlfriend, and I need to find the cleanest point to break her heart...
EDIT: I just wanted to add in the frustration of Toby not automatically assuming the hospital room was bugged after his "accident." You saw firsthand what sort of power and connections she has...