This game has obvious flaws, that I'll get to.
So, why 5 stars?
What I'm reviewing (v0.2.1) is the PROLOGUE.
And there is already ~3 hours content. More or less depending on if you skip, or take your time reading.
There are many girls, of various ages, body types, facial features, etc, so you're likely to find someone you like.
The story actually exists and is progressing. While nothing tremendous or deep, it is consistent and grows a little more in every scene, and leaves you at the end of the prologue curious where it will go from there.
Also (and a HUGE plus in this game's favor), you are not meaninglessly hated by one of your "room mates." You aren't hated for a good, well defined reason either. No, this game takes the courageous approach of.... neither of your sisters hating your guts!
Shocking!
And very welcome. The tired trope of "bitchy sister who hates your guts for no reason other than for you to forgive her and add drama to the game" is not present here, and good riddance! It works and serves a purpose in some stories. It doesn't in most, and dev here made the wise choice to not force that in.
So, issues? Visuals are not amazing. I'm not one for "slutty' characters and there are certainly a few girls in this game that fall fiercely in that category. Dev went a little nuts with the breast slider for some of the girls.
What are some things that are seen as issues that I don't think are?
First and foremost, lack of choices. Why is this not an issue? Because this is a prologue. It is setting the scene. The game "proper" hasn't started yet.
Secondly, lack of actual sex. Again, this is the prologue, so there is time for that to happen!
Thirdly, things seem to come a bit to easy. Well, consider who your character is supposed to be. Also, porn game logic. Now, as a rule, I'm not a huge fan of "porn game logic" as I feel many devs who use it are either being lazy, or have made a game that could have had otherwise compelling stories and characters, and betrayed them by using porn game logic to remove believability from the plot. But this game knows it is porn, and leans into it, in the right way, in my opinion.
Lastly, sandbox. At the end of the prologue, we see this will go sandbox.
A lot of people hate sandboxes, but I don't, if they're done correctly. With the number of girls in this game, your need to develop your powers, story scenes, etc, sandbox COULD be the correct approach. We'll have to wait and see, but I think it would be wrong to lose interest in the game simply because of that.
So, finally, my advice for the dev:
Choices in the prologue generally relate to what scenes we'll see, but, seemingly, don't impact the story. In theory, we'll be able to get points with all the girls. So, the club, for example, we pick one of the four, and see the scene, but are most likely just going to reload to see the rest, before moving on. Which one we see MAY effect some dialog, but seems doubtful to effect the story as it progresses.
I'd advise allowing us to see the same scenes (with small variants to account for plot) once we get to sandbox and can presumably revisit the club.
Same for the wine/sake/tequila choice near the end of the prologue. While it gets us a scene and some points with the character of our choosing, it doesn't look like it will effect the story as we can pursue all girls later. So I'd hope that whoever we didn't pick that night, we can do that scene during evenings in sandbox mode, to get those in our gallery, and character points.
Another thing I'd suggest (though from playthrough experience in other games seems to be difficult to do, likely due to the number of variables and checks) is to offer multiple paths. For example: do you go all in full corruption? Do you resist using your power and try to stay in control? Do you see power as neither being good or evil, and what matters is the person wielding it, so you give in but intend to master it and not let it master you?
You could even take this further by offering paths for the girls. Do you use your power to make them happy? To make them subservient? To help them? To ruin them?
Vivian is a prime example to me. Broken as she is, the corruption path could get quite dark, and interesting for those into that, but there could also be a path where the MC tries to thread the needle of using his power for his own gain, while also healing her.
All in all, I find this to be a very ambitious project with a lot of room to grow, and I'm quite interested to see where it is headed. Give it a look.