The title is a direct translation of the name of a song by The Cure, one of director Eduardo Moreno Fernández favorite bands.
"EndlessNight" was the working title. Also, "Kiss Me, Kiss Me, Kiss Me" was considered for the final title.
About 46 minutes into the movie, there's a direct shot reference to Federico Fellini's 8½ (1963), one of the influences for the film.