Iyulskiy dozhd / July Rain (1966)

July Rain is the one-film Soviet New Wave. A unique blend of idealism and realism, heavily influenced by Antonioni, nothing like it was ever again achieved - or attempted - in the Soviet cinema as far as I know. The virtually plotless story of a young unmarried couple's involvement and eventual break-up is told as a series of finely-observed episodes which together form almost an encyclopedia of the time and the place. Among other things, it is a priceless portrait of a somewhat fantastic city which no longer exists.

Imdb