I said many months ago on this thread that I think this developer(imo a lot of "adult game" developers have this as well) has an ADHD development cycle. Where they find an interesting idea and go with it for a while, then to drop it when they find something new. I have followed this game since its first few months and little to no actual story progression has been made in the 2+ years in development. It is all pretty much focused on which character can finally fuck the MC and how, and currently how can I "transform" the MC. Both of which I have no problem with if the game seemed to be moving along. But no for the whole game we have been stuck in this one area getting small updates here and there, and now there is another place where almost nothing besides "sex"/"Sexy" scenes happen.
It is a shame because I like the idea, I like some of the corruption elements, but it feels like another developer who has lost the spark imo. The initially concept of it being a Virgin daughter of a duke has seemed to have gone away because of all the rampant sex scenes and how all the the first time scenes play out. Either it is "Rape/ Heavy Coercion" or the scene plays out like the MC didn't care at all which breaks the suspension of disbelief imo; for example the brothel scenes, literally nothing different is said or done if you do them as a virgin even with the hostess saying it is probably not a good idea to say anything. For awhile after those scenes were added I was like oh okay that will be added later on now it is just to get the main stuff working, oh how wrong I was. The slave route has been pretty much abandoned, same with the futa elf route it seems.
So in a long af answer to your question yes and no. Depending on what you are trying to do in the game you can probably consider it finished otherwise it is still "technically" in progress.