The cinema itself is voyeuristic in nature, but I'm not sure I've seen a film that deals with the topic this... directly. In the hands of a lesser director this could have been a very creepy film, but under Leconte's hand (he's quickly become a new favorite) it's quite the tender, romantic, and tragic fable. Also, I'm in love with Sandra Bonnaire <3 I don't know how anyone could not be.
This reminds me a lot of 'The Tenant', which also had Michel Blanc. I think he has lovely eyes. It's still a totally improbably romance. In French movies, stalking is considered courtship. Ah, Bonnaire!