I picked this up after seeing it in the latest updates page a bit ago and left the tab open to come back to it.
Great concept, set in a future world where the dev can arrange things however they like, creating a backstory that allows, or demands that fathers need to train their daughters for their future, never a concern that you would be marrying off one that was no longer a virgin, more that if she was still a virgin, what is wrong with her that she wasn't good enough for her father.
The world building is complex and well thought out, though finding temples that haven't been raided a short drive from town is somewhat hard to believe.
We will agree never to concern ourselves with what it would take for any motor vehicle to continue to be functional centuries after the fall, no concern over dry rot on the rubber tires, oil changes, antifreeze to keep the engine cool enough to work in the desert, not bogging down driving over sand, (I don't think it actually touches the sand anyway as they never leave tracks, either driving or walking, but I digress...), degradation of any suspension components and exhausts, sparkplugs, air cleaners, etc. At least they understand the need for gasoline and that is the one concession for keeping a vehicle moving.
Graphicswise, the girls are all beautiful and unique and there seems to be a very large cast already. The family members all look like they are related without being too similar. The various settings capture the different worlds nicely and are more unique than your average set in the real world VN that all seem to use the same assets, so good job there.
I never played the game without the library set so I don't know how that has changed things but a couple comments on it. First, the cut scene when you enter the library is great the first time you see it but it just takes time every other time you enter the library. If there are not going to be interactions with the cast in the library, after the first time, it should just jump to the log. Then if you need to set something there other than the log, you can show the cut scene again to let the player know there is an action to perform. Along those lines, the log gives you exclamation marks to tell the player there is something new to read, but that mark does not carry over to the main house display like the other story advancing marks on the other rooms. If it was marked on the home screen it would keep the player from needing to continue to check the library for new information. I do like the way the notes pages work though, as they slowly introduce the world and character lore to the player.
I got caught in the just delete the step from stepdaughter and stepdad bug but it didn't bother me overly much as the game is still being worked on and I figured it would be fixed at some point in the future. Like others have said, a good use for the library to reset the relations in a running game.
Overall, a really good start and I wish you success with the game.
Now a game question.