For the film, director Laurent Bouhnik did not favor professional actors but instead posted a small ad open to anyone on the internet. In his ad he stated what he was looking for: "For this film on pleasure and desire, we are looking for actors/actresses aged 20 to 40, professionals or amateurs. who agree to shoot scenes with non-simulated sexual acts. We want to offer everyone the opportunity to apply for the main roles. Amateurs, professionals from theater, cinema, fashion, of any genre or illustrious strangers who believe in their talent. But we are not looking for gymnasts or sex addicts, and this is not a porn star academy. This project is a real cinema film and the strength of cinema comes through interpretation. In order to interpret the characters of our story, we are therefore looking for real actors capable of playing on feelings, of making people laugh, crying, of excitement, capable of conveying emotions to spectators."
Director Laurent Bouhnik instructed lead actress Déborah Révy to seek other auteur driven films with non-simulated sex scenes. Révy would cite Romance (1999) and Intimacy (2001) as sources of inspiration saying, "What all these films have in common is that it's obviously not ass!". Her co-star Hélène Zimmer would also cite these films as inspiration.
Lead actress Déborah Révy had originally auditioned for the role of Alice. However, as she read the script, she felt a much closer to Cécile, a feeling that she was able to convey to the director who finally hired her for the lead role of Cécile.
Actress Déborah Révy had already had the opportunity to discuss erotic themes in front of the lens of a camera. The young actress appeared in the Xanadu (2011) series, which deals with the world of pornography; as well as the film My Little Princess (2011), which describes the abuse of a mother on her little girl.
In 2015, Hélène Zimmer was asked why she accepted to film the unsimulated fellatio scene in this movie. "After two years in prep school, which were spent in a purely cerebral mode, I took the only feature film I shot, 'Q', as a performance that would free me, in particular, from my own self-judgment. Its main quality for me was the challenge it presented. If I could remove that scene, I'd be delighted," she said.