The good stuff. There are plenty of good gameplay mechanics, the art is nice.
The bad stuff. The pacing is all over the place. By the time you unlock stuff hidden behind tons of grind, you don't really need it. There is also no pressure to do well. The grind. There are also two(two and a half) themes smashed together, farming and idol/singing thing. Former is represented well in the story and most of gameplay, latter is just thrown in. In combat there is ONE skill that fits the story, "Milky way", where you unleash the rain of your breastmilk on your enemies. Rest are either neutral(like heal) or singing/idol stuff.... WHY? And bosses are all idols... WHY? Either integrate the whole idol thing into the story or make farming/breeding themed battle skills and bosses.
The weird stuff. Sex scenes are all fetishistic. At the very least 9 out of every 10 are. And it's not like there is one theme, they are all over the place. Breeding(impregnation, birthing, milking), zoo, shota(rule 7 anyone), dirty old men, nipplefucking. Even the only, the childhood friend to whom you prostitute yourself, is portrayed as fat/ugly/hikki.
4 stars if the fetishes hit your spot, 3 if not.