Jean-Pierre Melville – Quand tu liras cette lettre AKA When You Read This Letter (1953)


Wikipedia wrote:
After their parents die in a road accident, a strongly moral young woman named Thérèse Voise leaves a convent shortly before taking her vows in order to care for her younger sister Denise and run the family stationery shop with her. Thérèse is very protective of Denise and becomes concerned when her sister strikes up an acquaintance with Max a young amateur boxer and garage mechanic. Max is a self-centered drifter who is conducting numerous different relationships with girls at nightclubs. He is also pursuing a wealthy married woman, managing to get employment as her chauffeur and become her lover.