Several elements establishing the Marc Dorcel house style of porn are evident in this early feature (released just 3 years after Dorcel was founded), but the style and quirks of director Jean-Luc Brunet predominate.
I had just watched another Brunet movie from this year, "Julie La Douce", with a close resemblance to "Charlotte". Both deal with rape and innocence of a young fille, set against a placid, even glamorous non-story set against a lovely French countryside.
Essentially Brunet sucks the viewer in with an overall mood of pleasantness, only to suddenly inject violent rape to satisfy an audience's prurient interests, and then suddenly present an unlikely happy ending as if to say the violence didn't matter or harm anyone. I found this format of special interest when contrasted to the almost obligatory 1960s American softcore porn strategy (to counter censorship) of imposing a sudden unhappy ending (retribution or punishment included) to counteract the previous embrace of violence. It seems this French auteur working for Dorcel prefers to repress the violent sex with a sweetness & light coverup out of left field.
Movie is animated by a busty young natural beauty Claire Lenoir, seen horseback riding or bike riding along country roads as a free spirit. Her face resembles American star Dyanna Lauren of a decade later -not bad.
Jean Laroche is her dad, a pervert who gets off on panty-sniffing (presumably they belong to his daughter given the movie's title) and watching ladies disrobe through a one-way mirror.
Key subplot involves his friend Ghislain Garet, who cheats on his wife Cathy Menard (a top French Adult star/character actress of the period). Charlotte's handsome young boyfriend Tom Chaney appears only in a non-sex role, as we see the young beauty have sex with her piano teacher Patricia Violet and later in the show's climax, violently raped in the woods by Garet and trusty French porno stud Jean-Pierre Armand.
Hardly a classic, this and other Brunet works are worth seeking out, given the thematic elements.