so sorry if this is a bit of a ramble but but i just wanted to give you my thoughts. i think i've completed most of the current build cause i'm a little after the powder girl gets put in jail.
i feel like for what is meant to be porn game there are shockingly few sex/kinky scenes. the few that are there are fantastic and it is at it's strongest at those moments but they are just so sporadic and little of them that it feels a little disappointing. from my understanding the core fantasy here is basically gathering a harem of willing sex slaves and "saving" them is the context that makes it willing. and the girls fall into lots of popular tropes and archetypes and honestly it's a great idea and your execution of it is great when your focused on it. cumming on the sisters face and having her wear it all night was hot as hell and the nun that was masturbating while you spied and things she said while she did it were amazing. i was super disappointed when it the mc was found out.
the structure of both the main plot and the girls individual stories are all over the place. it's pretty clear the story progresses for each girls in the order you work on them and it shows as i'm playing. i think the game could benefit greatly if you had a more focused structure to work from and filled in the gaps of it when your able. like getting "x" number of girls to "y" affection level to continue the game and then give a decent size section to the main plot. you do that to some extent at the moment but when i say "x" number of girls i mean the number of girls the player is working on at the moment. so many stories can be left for a super long time despite me being interested in a couple of girls in particular. the sister and mother character basically get forgotten about for ages.
i think on average you should strive for about 80 to 90 percent of the affection levels to have some kind of kinky scene. you can mix in some lore stuff in if you want but the sexual fantasy of it is almost non existent at the moment and for a porn game that should be the highlight. context and story can bring the kinky scenes to whole new levels but we need some regular doses of it.
i also think the immersion of it could use a bit of work. the occasional 4th wall break has been a huge immersion breaker for me and cheapens it a bit in my opinion. i get its tongue in cheek stuff but it sucks me out of the moment every time it pops up. i also think some of this kinky stuff should be repeatable in world rather than through the replay feature. it sells the fantasy of building your ideal harem fantasy if say every morning if i go in the kitchen and my mom is there in her naked apron and we will bang if i ask her to. or if the nun gives you a key to a room with peep hole to the confessional cause she gets off on the thought that you might be watching her masturbating in there at any moment without her knowing. and she can have list of kinky stuff she will confess to that is selected at random. or you can choose to replace studying with your sister with cumming on her face to "improve" her magic power. it will give the player a feeling of hitting milestones and let them "partake" in their favorite girls repeatedly while keeping the immersion of it by putting it in the dialogue rather than redoing one time scenes from the pause menu.
sorry if that was a bit long but i was thinking about this stuff at work today and just wanted to vomit them out at you as they came back to me while i was sitting here. i hope to see more from you and i hope you give my ideas some consideration.
edit* as a bit of personal request i would love it if the sister wanted you to cum in her lunch in the morning to keep getting regular doses of "essence" to try and increase her mana. and the mother would jerk you off into it for you in her naked apron.