How hard can we go?

I've been a member here for two years, not that you'd know. I don't always log in, but I've read a lot, and I know that there is a lot more here than anyone could read, and I know that that not every story appeals to every reader.

There's a story that's been banging around in my head for a long time that I'd like to write, but I don't want to post it if it doesn't belong here. So here is a general idea of the situation, and if it doesn't belong on BCTS, no hard feelings. I'm very happy here and love a lot of the stories I've read. I think this site is run well and wisely and I'd rather check before diving in and causing hurt feelings.

This story would have CAUTION tags set and a big warning at the start of every chapter so no one would blunder into something they would later wish they could forget.

It's science fiction. To put it generally, some men crash on another world (let's say), and one of them is not only forced to feminize to a certain point, but also to become part of a societal class that are captives.

Captives aren't slaves, but someone sensitive to the topic would see them that way.

They don't perform forced labor or sexual services. They aren't harmed physically or humiliated individually. Their function is somewhat decorative, and their presence and passivity are meant to show the martial superiority of their captors.

There would be a fair amount of explicit sexual scenes, but I see there is a tag for that.

I hope I'm not being too vague, but I don't want to tell the whole story here.

Would it fit BCTS, or should I take my wares to some other site?