Oh wow, carving a niche eh? Will you be going for a more western comic or eastern anime / dongman style?
Don't know much about 2D, but from what I observe it seems to take more effort to do especially if there are animations. Some developers augment with AI, but that introduces a whole set of other problems...
I haven't come across a 2D adult game that carries the dark cyberpunk atmosphere well, many of the Sci-fi ones made with Koikatsu look too bright and chirpy.
Something like this https://www.fiverr.com/hentai_custom/design-and-make-a-video-of-any-character-in... would be cool... Haha just me fantasizing.