It seems you are referring to "Journal Intime d’une Campagne" , a title produced by Marc Dorcel (the French adult film studio).
The Diary Motif: The journal serves not just as a plot tool but as a means of grounding the film's eroticism in a sense of personal fantasy and voyeuristic observation. Production and Cast MARC DORCEL - Journal Intime De Campagne
2006 (French Video), with a stateside release via Wicked Pictures. Narrative and Aesthetic Analysis It seems you are referring to "Journal Intime
The film opens with a slate: "The names have been changed, but the parties are real." frequently incorporating elements of drama
Marc Dorcel is a filmmaker who has been active in the adult entertainment industry for many years. He is known for producing and directing content that often blends eroticism with narrative storytelling, frequently incorporating elements of drama, comedy, and romance.