Watched in 2009/2010, live-action, might have been non-English
Beginning of the movie starts out with a bunch of young girls (around 12 or so) being taught ballet by a mean, old lady. Eventually, they're performing for old men to be bought as slaves. The main character is potentially raped by the man who buys her. The end of the movie is a POV shot from the house/cabin the man lives in with the girl running away.