Train Slut (f seeking M/Futa)

I had an idea for a bit of a twist on these train porn ideas... MC maybe doesn't even start off as a slut, just a regular girl heading to work or heading home or even both. My thought is a progressive amount of public humiliation, but she finds she likes it, so not only does she seek YC out on the train, but is more than willing to let them play with her, enjoying the humiliation as they do so. I'm thinking maybe the first time YC openly strips off her bra and fondles her tits, and then progresses each time she enters the same train, to the point they're downright fucking later... what happens when she goes home with YC that night? Do they make her their personal slut, humiliation whore, etc?

I'm thinking this would be dark... that YC really is a dark kind of char, and is into more than humiliation. I'm thinking humiliation, bondage, the works... definitely public nudity for her eventually.

I am into whatever you're up for on this one, maybe YC even makes her cum hard on the train each time too, so that the whole car hears her orgasm. Hit me up for your ideas on this! I'm also thinking she's young, like as young as BMR permits or whatever you would be comfortable with. I'm good with either M or Futa on this one... maybe if YC is Futa, she doesn't realize until their cock comes out. Thinking lots of humiliation, slut training, master/slave, and slut shaming.