Good idea, horrible execution. There's basically too many systems and layers in this game that it's utterly unplayable from a narrative perspective.
Let's start with the tech tree. There's literally hundreds of upgrades / tech to unlock that there's no real meaning to it. Once a tech tree's branches are too wide, information overload occurs there's no real min / maxing.
Next let's talk about the sex, in a sex game. Which ties in with the plot. Basically princess + maid + adventurer girl (who for no real good reason decides to pledge her virginity and prositute herself to Princess's kingdom wtf?), from day 1, can become whores to generate cash for the kingdom.
What an utter non-sense and shitshow of morality. Prositution in most games, especially virgins, is seen to be end-game content for moral corruption. Here, you can whore them out from the start with no real progress. Sure, there's the standard events of each girl having various kinds of sex, but it's all meaningless if it doesn't feel earned. We do not feel attached to any of the girls, unless you choose to unlock their "bond" events before you whore them out. Which doesn't make sense if the option exists from the start even with the prude start.
Which brings us to the events. All are viewed in the same interface, information dump all at once. If you prostitute the girls from day 1, like I had with my dick out, you'll be displeased that the Princess and Mercenary girl that you set to Blowjob ONLY, and with the BJ icon next to their UI in the brothel interface, to proceed to lose their virginity and do other things that you did not permit.
However, you don't even get to see those events unless you view them in the viewer. Which is what I mean by narrative mess. Within a single day at the brothel, the girls basically each unlock 3-4 different sex scenes. Blowjob, handjob, riding cock, etc. Where's the sense of progression if they give you all the scenes for you to browse? There's none.
Voice acting, good. Combat system, innovative and took some real programming. Everything else, absolutely non-sense.
There's also seem to be no NTR / game over rape event, which is particularly weird since you can romance the girls before you send them off to the brothel. As well as fight bandits who make lewd remarks about your girls. What a waste of a good concept. First time I've seen a game do TOO much at once.