Some people here have the wrong expectations for this game.
It's not a game about corrupting girls into becoming prostitutes. I haven't encountered any corruption elements so far. And it doesn't quite seen like a romance game, even though you can romance them. It seems to be mainly about rebuilding the kingdom and figuring out what happened with the previous king. I mean, it's literally the fecking title. XD
This is a game where the girls are determined to revive their kingdom, so they have the determination and resolve to engage in both prostitution and thievery.
That is why you can put them to work as prostitutes right away. They know it's the best way to earn money quick, so they take on this job.
Yes, in this game, prostitution is simply a job. You can romance the girls and still send them to work. There's no hard feelings about the girls getting it on with customers, because it's simply their job. They still come back to you. They still work for the goal of reviving their kingdom.
There is no NTR because there are no feelings associated with whoring them out. Nor any possibility of them being stolen. Happy prostitution is probably the best way to describe it.
This really is more of a story game than a generic nukige. If you're expecting a game where you can just skip the text until a sex scene, then this game isn't for you.
I haven't played far enough to say yet, but I feel like this is the type of game that could stand by itself even if it didn't have any erotic content.