Un tentativo sentimentale (1963)

Dino and Carla meet and spend the night in a deserted house by the sea. Both are married but their marriages are in crisis. They make a pact: without saying anything about each other, if one of them does not come to the next appointment, it will be all over. After some time, while Carla decides to leave her husband, Dino does not show up anymore, not having the courage to face such an uncertain situation. However, they do not delay in meeting again, almost by chance.