Around 1 hr 9 min, when Eun-yi is sitting on a bed, in the background is a large piece of art with English words faintly visible on it. The words are a quotation from Nathanael West's novel Miss Lonleyhearts, a work with many themes that mirror those in this movie such as depression, lonliness, drinking, adultery, and physical abuse.
There are two scenes within this movie which show a large scar, or burn, on Jeon Do-yeon's upper thigh. Asked about that by Hangul Celluloid website, director Im Sang-soo said: "Jeon Do-yeon does, in fact, have a scar there, and before filming began, she mentioned the scar to me because she knew that there were many scenes involving nudity within the film. I didn't have a problem, or filming issues, with it at all, but as shooting progressed, I felt that the scar matched ideas within the film very well, so it is true that I had a couple of scenes specifically focusing on it. We could have erased it with computer graphics, but I talked to Jeon Do-yeon about it and we both agreed that it matched the film so well that it should be kept in."
An early draft of the screenplay was written by Soo-Hyun Kim, but after director Im Sang-soo had edited the script so heavily that Kim considered it to be entirely Im's own work, she decided to leave the project and publicly expressed her dissatisfaction.
This movie is a remake of 1960 Kim Ki-Young's The Housemaid