A Few Days with Me (1988)

Martial is discharged from a mental insitution where he spent a few years due to a serious nervous breakdown. Upon his return he finds his mother, a busy business woman who owns a supermarket chain, convinced that her son will be able to find himself again if tasked with some responsibilities. Soon enough, he's sent to Limoges on a business trip to check on one of their stores in the hope to reinvigorate the failing business. Once he arrives, Martial is faced with responsibilities he had never imagined, including dealing with the store's personnel.

Source: TMDb