Wise Guys (1961)

Ronald, an idler living on the Left Bank in Paris, is determined to inflict a terrible revenge on his friend Arthur, after the latter subjected him to a harmless joke. He engages the services of the seductive Ambroisine, who pretends to fall in love with Arthur. Oblivious to his friend's scheming, Arthur is certain that Ambroisine's feelings for him are genuine and looks forward to their wedding day.