I first saw this film in an arthouse cinema when it was released, and I remember feeling that the film seemed a bit unsatisfying. I was rather hoping that Lili would actually make love to her much-older beau, but they seemed to be limited to hand jobs and oral sex (the first time she finally appears nude, late in the film, this is all they do; she hides under the bedsheets while he disappears with some other woman, and she is left, naked and crying, in the bed).
Yet this is a decent film, and not the unbridled kiddie porn that so many reviewers here might have had it be (although I'm really thinking of "The Lover," I believe Delphine Zentout had to be at least 18 at the time the film was shot). What I find fascinating about these films is the fact that I know women whose sexual development is much like those of the female leads in these films. Lili even reminds me, now, of my fiancee in both physical and sexual aspect and, to some degree, psychological aspect. She (Lili) is a troubled girl with a deep and rarely satisfied desire to break free of her family, and her sexual pursuits provide her what little relief she can find, even on holiday.
Definitely worth a look.