I'm surprised I haven't (or found) a story here based on this popular and controversial series. I can see like you play as a new reviewer of any species and review some new brothels that may or may not have been reviewed already. A lot of possibilities in this. Story Started here!
I have a lot of friends who are into this show and I've been meaning to give it a try myself. The basis of the manga/anime- reviewers checking out sexy fantasy destinations- seems like a good fit for a story that acts as a collection. If you start it up, I'll check it out.
I could see it being popular here. Lots of people like monster-girls/fantasy settings. The series was good fun but a bit too wish-fulfilment for my sakes. If I tried to write anything in that universe I'd be too tempted to take it in a darker direction wondering why all these monstergirls are forced into prostitution in the first place.
The episodes I saw were a much higher quality than I expected them to be and it is a little charming. I suppose you could do a story that's some new character either exploring other brothels the protagonists missed or skipped or maybe the character is more interested in doing individual reviews and gets to know certain prostitutes more personally (like an excuse to in-depth explore characters that were one-offs from the show). Or yeah, something that explores why the characters became prostitutes in the first place (or is even from their POV about what their day-to-day is like...)