L'Arnacoeur

The bulk of the story takes place in Monaco. Charming attractive Alex (Romain Duris), his sister Mélanie (Julie Ferrier), and her husband Marc (François Damiens), operate a unique business for concerned third-party clients—breaking up relationships, but only where the woman is "not knowingly unhappy." The trio concoct elaborate, custom, and sometimes expensive ruses to deceive the women. After each woman has fallen for his act, Alex tells her she has made him come alive again, but that it is too late for him. The women presumably leave their relationships to seek men who make them feel the way Alex has.