Na Boca do Mundo (1979)

A black fisherman now working at a local gas station, Antônio lives at the small beach town of Atafona. His biggest ambition is to stash enough money to leave to a big city with his fiancee, a mix-raced girl who sells fresh crabs to locals and wishes for a better life. When a rich white woman from the high society arrives to spend a few days away after ending a failed marriage, Antônio soon bonds with her and begins to change his plans.

Unfortunately the movie Na Boca do Mundo is not yet available on HBO Max.