Wikipedia
Perras
Perras (lit. Bitches) is a 2011 Mexican Drama film directed by Guillermo Ríos based on the play of the same name. Its plot revolves around 10 schoolgirls who are all suspects of something terrible that happened at school, focusing in the memories and feelings of each girl. This is the device that gives us a glimpse of the ethics, games, esthetics and eroticism of these girl-women.
The movie was heavily promoted as a Thriller in trailers, posters and other media, but some critics found it misleading, since fits most in the drama category due to its content. The film premiered in theaters in Mexico City on March 4, 2011.