"A nous deux" is a LeLouch neo-noir to be found on IMDb under the title "Us Two". This one is relatively obscure, only 2 critic reviews and 4 user reviews. One critic is Merkelbach again:
"Alone with two is no gangster ballad and no crime comedy, as is often claimed. Although bitingly ironic and partly grotesque, nothing is brushed on Lustig. Even an explicit rape contradicts the comedic. Instead, Claude Lelouch takes up the theme of escape from classic film noirs such as Joseph Lewis's Dangerous Passion (USA 1950) and Arthur Penn's Bonnie & Clyde (USA 1967), in an idiosyncratic French manner to set his record with the Europe of the Seventy , The gangster's parallel society is a means to an end, and the fact that the refugees are at home in music is no coincidence. By contrast, bourgeois society appears corrupt, vile and above all merciless through all strata. On the ground, Claude Lelouch develops the theme of solitude for two, that of inner and outer isolation, with a keen sense of his characters and their history."
Definitely has a bittersweet quality for the very slowly budding relationship of a scarred woman (Deneuve)and a criminal man (Dutronc), echoes of a 30s Gabin, while being considerably different. They are on the run.
Thanks to Matthias for pointing out these neo-noirs. He gave Montage 3/5 and "Us Two" 4/5.