I could be interested, but these kinds of stories tend to suit me better as one shots instead of a large continuous story. However, I would like to throw out some ideas for how the society might function. To help out a bit.
These are off the top of my head and thus rough. I haven't spent much time thinking the ideas through.
Since the society is male dominated and most women being slaves, this means a drastic decrease in female workers. Even if women are used as slave labor in all manner of jobs, the efficiency will be very low on their part. Due to lack of training, desire, fear of messing up, etc. This means that this society will be functioning on a much less capable level than modern society.
It can still have tech and such, but advancements would likely come slower. Though an exception would probably be new ways to watch, maintain, and control women. Genetic research would probably be more advanced as men would want women being born who are more likely to be very attractive. Plastic surgery and breast enlargement would likely be much more refined; aka, less fake looking (plastic surgery), and breast implants would be less dangerous for women and could look more realistic (as modern implants are easy to notice).
Birth control would likely be much more refined and less prone to fail or send women's hormones out of whack. Mens and women's surgeries to get them fixed, would also likely be more refined and less prone to fail or send women's hormones out of whack.
Status by enlarge or merely in some circles, could be influenced by number of slaves and or their looks. Though, that would make society even less efficient, as too much emphasis on acquiring slaves would skew an unimaginable number of societal functions.
The main problem with a world like this, is that basically only one gender is truly contributing to the growth and or maintaining of society. Even back in times when women had few if any rights, they still contributed to society in meaningful ways. This world of Erenisch's, appears to take women almost entirely out of the picture (from what I can tell. I haven't read any of the comics - so I could be wrong). Thus, society is forced down a few notches and men have to compensate more. Unless women are given training for jobs, but are still slaves at the same time. That would equalize things a bit more back to "normal".
Maybe not all women are outright sex slaves. Maybe some become more indentured for life - aka work force women. They might still be sexually used/abused, but that is not their primary purpose. Others become sex slaves. They would not contribute to society at all. Only existing to please their master.
Slavery, now being legal, would be a major component of economics in the form of the slave trade. This could possibly make up in part, for the lack of female workers (if they aren't used in the work force). If women are used as workers, then this influx of cash could put things back on par with modern times, but is still unlikely.
Depending on the country, certain ethnicities might fetch a higher price or be worth more on the "used" market. Women who are young and fresh to the market would fetch the highest prices. Virginity could be a plus or minus to the price depending on society/culture. Same with if a woman is sexually experienced. Older women would be worth less, though MILF's could still fetch a good price. Women who cause trouble or perform poorly would likely be worth less and traded on after market venues. That goes for women who aren't as physically attractive - dependent on society/culture.
As an example, in modern America, men like big breasted women who are slender and not taller than the average man, 5'9". Since American's are used to all varieties of skin and hair color, those factors wouldn't be a huge factor in pricing and what women sells best. Though brunettes and blondes would be the biggest sellers, with black haired women a close third thanks to the large population of Mexican's.