I understand the number of reviews on various sites that say some aspects of the game feel repetitive or that it requires too much grinding. Personally, the only thing I think it lacks is that it's a bit too "erotic," so to speak, due to the fact that it has very good concepts but little visual support for the erotic aspect. Aside from that, and the fact that I also think the leveling up of the heroines is sometimes very annoying, I think it's actually a VERY ENTERTAINING game. I don't know if this is your first full game, but if it is, then it's an outstanding piece of work, and I can only advise what I said for your future works: try to add eroticism to the visual aspect as well. The concept and ideas in general seem good to me, and 85-95% of the time, they're executed very well.
P.S.: A section briefly describing each class (especially the cursed ones) would be very helpful. Sometimes it's difficult or time-consuming to get a sense of what role or purpose each class has, or what position they'd fit well in the build. And if such a section already exists, make it more visible, as I haven't found it yet.