Thank you for your feedback! I'll take care of putting it on HHS forum so that Goldo could read it. Meanwhile, allow me to clear some points you pointed at:
- there's always room for new random events and the community of BK is starting to grow up only recently, for example I'm taking care of the jobgirl events and a few more people are doing the same with other events, so that Goldo can afford to focus on the main plot; any idea can be brought to him and possibly be implemented
- girls upkeep cost is not their allowance or job reward, it is in fact the daily cost MC should pay to maintain the girl (room, clothes, food etc.); you noticed how this cost raises up when a girl ranks up, this is due to the fact that MC has to immediately show the new girl,s rank to her clients by buying better stuff for her, of course the new rank brings a better gain but on the other hand the girl needs more training before it's maximized.
- another thing which kept the micro management light is that you don't need to take care of every girl's room; assume that every girl has her own room and its cost is included in her upkeep, so that when she whores she already has a private space where to work; the common rooms (club, bar, onsen and okiya) deserved a different management since the larger they are the more people they can accomodate
- For now the only two ways to get a whore are buying one at the slave market or recruit a free girl; that said, like the random events cited above there could be room for further possibilities, in my opinion a few events where MC actively seeks and captures a few special slaves could be part of the game, but I wouldn't let MC do this as a main activity, he's not a slave hunter after all, he's a trainer and brothel owner; as they say, so the shoemaker shoes...
- There are some laws in Zan about slavery, we can resume them like this: a magistrate can condemn someone to a life of slavery (debts and crimes are the main reasons), so if you find a girl raped by a gang of thugs in the sewers and then enslave her without her consent, you commit a crime and risk to be enslaved; furthermore, MC meets that girl again in a morning events, she's a secondary NPC and could have important roles in the future. Don't forget that Zan is a city of plots and political machinations, so the more friends MC can thake, the better.
- The images are picked from various anime and videogames because there's no art team developing BK; the only developer was Goldo, until recently when he accepted the help of a few people willing to write minor events. It would be great for BK to have its own artwork, of course, but it would cost a lot of money and Goldo is not making BK to gain money, he spends his free time to create it driven by his passion. But hey, who knows what future will bring us tomorrow?
As a side note: girls rank S does exist, in fact girls can raise their ranks up to X class, at that point they could teach lessons about sex even to sex goddess herself!