Craving an RP that's taboo and kinky, yet romantic and plot-heavy (MxF or FxF)

"May, a rather elegant young women, tall, well dressed with long flowing red hair and a fair complexion; and then Sura and Pari, twins. From their olive skin tone and thick black hair it was unmistakable, they hailed from the Eastern continent of Yarin. However these two were a far cry from the gentle Yarin Princesses one would read about in the history books - their black hair was cut short and barely reached their shoulders and in contrast to May's dress they wore more boyish tunics and pants, though they still fit tight enough to show off their feminine figure."

The above is a little snippet taken from one of the RPs I did in the past which, unfortunately, ended before I could use the characters. What I propose is a story which would focus on these three women, (in the original story they were merely supporting characters), a spin-off, essentially.

The setting is a medieval fantasy world, one where magic is used but is generally frowned upon and only used openly by outcasts. However as noted above in the description, two of the characters - the twins, are of Eastern origin rather than European, so this RP could be set in this world's Ancient Egypt/Persia equivalent.

If you wish to make this a F/F/F RP then you would play May, and I would play the twins.
If this were a M/F/F RP then May would not be involved, not as a main character at least. Instead she would be replaced by a male character whom I have ideas for but can discuss.

This will have a post-apocalyptic setting (steampunk perhaps?), where MC is a rather bossy, boyish girl, some years older than YC, to whom she's somewhat of an elder sister figure. The story will begin with some snippets from before the world ends, before skipping forward a few months when our characters are only just beginning to adjust to their new lives.

YC will start off as submissive, unconfident, and overly reliant on mine, but will gradually start to come out of his/her shell as time goes on, eventually becoming rather dominant.

As far as the plot is concerned I have some ideas, but nothing set in stone as of yet, so any ideas you may have are more than welcome.

YC will be young, dumb, college student who, being young and dumb, had managed to blow their college funds and is now broke. They can't go to their parents, the bank won't help them either, so their only choice is to come to MC, a friend of YC's parents who agrees to pay off the debt, but not for free...

Can possibly switch roles if you'd prefer