Bit late on this in terms of giving feedback but wanted to do so either way.
Focus on the Harem route, though I did take a glance at the other two.
First off : overarching story in a Harem game is always silly. No way around that. So that is not what I usually focus on. I am more interested in how the Dev portrays the inner workings of the Harem. Many writers/devs avoid dealing with that all together by using plot devices like mind control, corruption, magical powers or ignoring it completely.
I was pleasantly surprised to not find this here. Not only is the reason why the MC and the individual members of the Harem are attracted to one another fleshed out , but there is also considerable effort put into creating a network connecting the members with one another. A good Harem plot needs a focal point inside the Harem to make it more plausible why they are willing to share (however absurd the whole premise in itself might be) . You have two equal ones, that are basically the core to which everyone else connects, which allows them to interact with the MC without the whole thing imploding.
Definitely one of the good approaches out there in terms of dealing with a Harem plot plot. Good work