I like the basic idea for the story, and I know it's just the first release but here is some feedback from me.
The first thing not only applies to this game but all new games don't make so short first versions.
My second point was already heavily discussed on the previous pages but I will also give my thoughts about it, Sky's virginity. Can I accept her "white lie" about it, yes but there are better ways for that scene to be written and avoid the whole discussion about it. This is what I would do, cut the line after "do it slowly" or change it to something like "do it slowly because you are so big" because at this point Sky not being a virgin is only in the MC's head and change the line where the MC thinks that she is almost as tight as a virgin to him realizing that she is a virgin.
You also could have gone the route the Dev of A Clever Name did with his MC and the sister character.
The door scene with the 3 girls felt a bit dragged because of all his thoughts about them. Would have been better to put the part where he thinks about his plan and its abandoning of it at the start of the game before the screen with the name of the game.
Last but not least my biggest problem with the story the whole Emma scene, fuck I don't even know where to begin maybe that the MC is too nice. Maybe the scene wouldn't be so bad unliked if it was longer which proves my first point about short updates.
Personally, I would rewrite the complete scene with a more resentful version of the MC and threaten her to throw them out.
Consider it a demo. I don't think the dev already has the complete story in mind. Hopefully he does make some changes in the future.
I mostly agree with those points except for a few things.
1. Sky's virginity is a toss-up. Your complaint there is more of personal taste. Regarding "do it slowly", She did say that it's been a while since her last, which is an ok excuse. Yes, you could have skipped the discussion about each other's virginity altogether as it does seem forced for the sake of exposition, and it would have been more natural, but the dialogue was fine as it was. Remember, at the end of the scene Sky mentions that had she hinted she was not a virgin the MC would not have done it.
2. Yes, I agree, this bit of exposition should not have been bombed on the player on this intro sequence for the 3 girls. But it would be bad writing if this was just a given at the very beginning (prologue) as this makes the entire sequence from waking up to going to work completely unnecessary to the plot. What would be better is if this information was shown, instead of told. Like present how the MC struggles to make a decision on whether to pursue or not. It would also be better if the MC did not assume everything at the start (like how he assumed Gwen and Aine worked at good companies). His last contact with them was in HS, unless he stalked them, he should not have been privy to their after college work. It would be a good plot point to make the MC learn of this and how they lost their job midway instead of at the beginning.
3. The threatening part. The MC doesn't have authority to kick them out. After all he is just a tenant(by default). It WOULD be better had this reveal be around the middle of the story with more things going on. Aine actually opening up on the 1st day and the reveal the next scene after feels too rushed and unearned.
I would suggest to put more meat in between the intro and the reveal. It would have much more of impact if the MC had been helping Aine out of the goodness of his heart or plotting his revenge (if you want light and dark routes) before Emma reveals that she knows who he is and the MC would be conflicted about his feelings.
Then again, since this is a first release, I guess you can consider this more of a proof of concept unless the dev really wants to stick with the current story (which is often the case for part releases).