So I don't normally rec stories - there are just too many good ones out there, and really, most people on my flist have found them before I have.
But this one just caught me. I started reading it yesterday and couldn't quit until I finished it today. It's around 80k words.
A Dish Served Cold, by eurypon
Partial here: http://www.fictionpress.com/s/2783664/1/
All 16 chapters here: http://www.ximerion.com/index.php/dish
Authors Summary: Andrew Ashton grows up in a world very similar to ours, but where slavery has been reintroduced. While trying to deal with growing up gay and looking for romance, the institution of slavery begins to intrude uncomfortably on his life.
( My Thoughts - NO SPOILERS )