For a while, I've said I don't want to make a brothel simulator because so many other people are making good ones. But now Marune's game is crumbling, meismike switched to those new sprites that I hate, none of the Breeding Season replacements have really taken off, and a bunch of other brothel simulators just don't do it for me. The other half of my argument was that I'd rather make arcade style games, but Flash and Unity have failed me, while RPG Maker MV stands alone in being able to handle the wide steely dick of ASV graphics.
So while I have no immediate plans to make an MV Brothel Sim, I am starting to wonder about how one would do that, what would it look like. If any other RPGM developers are reading, feel free to use these ideas yourself.
Firstly, my favorite brothel simulator is still Hentai Sim Brothel, so my version would probably look more like HSB than like any of the others. In particular, doing the randomized armature characters that Marune's, meismike's and Breeding Season have in RPG Maker is technically possible for sprites but probably not for cutscenes, and would require scripting some of it myself, which I'm not wild about. HSB's system of specific characters is more similar to how RPG Maker is deisgned to work, so I wouldn't have to fight the system as much to do it that way. It is more work, but since I've got 3D graphics, there are ways to cheat, and it has the trade-off of making each character more personal, more unique.
I think the main difficult thing would be to achieve a sense of time, since RPG Maker by default doesn't do that, but it's central to all brothel sims. Marune's hour-by-hour system would be the most difficult to duplicate I think, especially having multiple things going on at once. HSB's system of doing everything at once at the end of the day could also be tricky, or at least very messy to code, which makes it hard to add more later or fix mistakes. meismike's system where each girl has a set number of uses and you press a button to restore all uses and pay your daily bills should be easy enough, although having a big list of available characters would require plug-ins and probably some creative coding. Breeding Season's time system would also be doable where each action costs time and energy and you have a reset button that "ends the day", but same story about lists of available characters. And actually, maybe there doesn't need to be time at all, but something more like RPG resources, like you take girls out into the town and they lose HP or MP to do sex and make money, then you bring them back to the inn or your base and restore their health and go out again. Although that's arguably turning into a different kind of game.
Since RPG Maker would inherently make combat and exploration more plausible than coding all that yourself in a Flash game, it would make sense to try and have some kind of system like Marune's or GoRepeat's Season Breeding game where you can fight thugs and find women out in the field. This is where theme could make a big difference in the game, based on the graphics I have, I could do things like a modernesque theme, a fantasy theme, pirate theme, maybe sci-fi, etc, and each of those would change what sort of fighting or exploration you would do and what possible rewards would be available.
Having character stats should be easy, after all that's what RPG Maker is designed for. RPGM gives you the ability to rename all of the stats, so you could rename magic to boob size or something like that if you wanted. But this would be universal, so if you want a system like Marune's where there are both male and female characters, and the female characters can either fight or do sex, then you need to change your approach. Yanfly has a plug-in that allows you to make more character variables, but as of right now, I'm a little confused about how to display those to the player or access them through code. Another approach could be that there are separate fighting and sexing characters, with fighters using the default RPGM stats and sexers using RPG Maker's variables, although this would get very messy when it comes to putting characters in a list. It might be possible to make the sexers as characters in the RPGM editor, but never join the party. You should still be able to level them up or read their stats or equipment through events even if they're never in your party. Hm... interesting.
So, I'm pretty sure it could be done. I think the theme would have a big impact on how you approach the game mechanics, so I would have to decide that first. I remember two sort of brothel-sim-like ideas I had in the past. One was that you're a pornographic studio in space, or in a sci-fi setting. The girls are not usually having sex with people, but doing web-cam stuff for the camera, and you can buy them new equipment like fuck-machines, growth-rays, pudding chambers, tentacle pits, cloning chambers and so on. The other idea had been to do a gang fighting beat 'em up game, which would switch to RPG combat instead of arcade combat for this, but the idea was that you own a strip club that does prostitution and other illegal activities. You hire women to work as strippers and whores, and men to work as muscle. There are several other illegal organizations like this in the city, and part of your job is to send your muscle to raid these other organizations, steal their women and contraband and bring it back for your own base. A variation of this theme could be that you are pirates or barbarians or sorcerers or demons or alien invaders or whatever instead of street gangs.