Die bitteren Tränen der Petra von Kant / The Bitter Tears of Petra von Kant (1972)

Petra von Kant is a successful fashion designer – arrogant, caustic, and self-satisfied. She mistreats Marlene (her secretary, maid, and co-designer). Enter Karin, a 23-year-old beauty who wants to be a model. Petra falls in love with Karin and invites her to move in. The rest of the film deals with the emotions of this affair and its aftermath. Fassbinder tells his story in a series of 5 or 6 long scenes with extended uses of a single camera shot and deep focus.

Imdb