I'm gonna go full wall-of-text here: I loved the demo, and will be looking forward the next releases. It felt like a more polished version of Roundscape Adorevia, which despite its rough presentation set the bar for all western h-games that followed.
Thing is: with RA, the gameplay felt like an obstacle -- it was the amount of scenes and the "you never now how kinky this is going to be" that prompted you to continue. (Even if I needed to use a Dark Souls-style guide to get everything.) Parasite Black is not only quite fun to play, and with the level of depth for the combat system, but the
care you put in the dialogue and world-building make it even more compelling to go through. Great achievement.
My feedback about things that could be expanded on: in general, I'm dying to see more Markus smut at this point. He is effectively the deuteragonist in terms of plot and gameplay, but with very limited access to "pay-off" scenes. There's a lot of tease involving him getting in on the action, especially with his naked sprites thrown in the player's face early on. The moment I saw that and remembered the "gay" content tag, I fully expected Markus/Protag along the way. It was a bit of a bummer to find out this isn't the case at this development stage and that the one scene of him is just a name swap (heck, I'd be content even if we could at least CG-swap him in certain scenes).
In general, the relationship with Markus holds loads of potential to both fans of swinging/sharing and gay/bi fans. Or just those who, like me, would rather see the RA (or Seeds of Chaos) approach as the standard: i.e., everyone should be a horny fucking animal, and, eventually. most of the possible combinations between characters should be explored according to what fits the player's kinks. The ability of the parasites to bend wills and the need for the guys to get more and more satisfaction (more extreme kinks?), a golden ticket for that.
On a broader note, the kinetic VN approach felt very right with the frequency of sex, of course starting with the more vanilla handjob, MF. During the main game, there were often points in which I 100% expected/wanted some scene to take place, or at least the build-up felt satisfactory enough for one. I'll give the few examples in which I was like "please let there be porn in here":
Down the line, eventually, sex and combinations with mother/sister, or swapping would be the biggest turn-on well (e.g., Markus' mother or own sister; this again due to them needing more "extreme" stimulation?). In general, I hope the family and Markus get the most exposure to steamy group sex, together with the protagonist.
Needless to say, this is an amazing first build. You should be proud of the work done.
