I understand why this game gets hate. First, this game is a grind, and in case the devs are unaware, under no circumstance is grinding fun. Second, this game has a day/night system, and, again, under no circumstance is scouring rooms to find different scenes during different phases of the day fun. Third, and this is a weird one, the best scene in the game (spin-the-bottle) is RNG based. Like, why the hell would you design a scene such that you can miss so much quality content, which can be supplanted by interactions you've seen before?
With that said, the corruption of Lily is well done (although, it progresses a little too fast for my taste). And the character model of Lily couldn't be more perfect for the corruption genre (i.e., sweet, innocent, nerdy, naive). Also, just in general, the character models are hot and many of the scenes are well executed (although the writing for Molly could use a little work).
In summary, this game is poorly rated due to baffling decision making by the devs, but at it's core, there is a lot to like here. Also, to the devs credit, they have started to incorporate a typical VN format in their updates (although it doesn't contain all of the content). Hopefully the devs will realize the error of their ways, and stop going out of their way to make their game less enjoyable.