Break Up (1978)

Original title: Eutanasia di un amore

Paolo has been reasonably happy for the past 10 years; he has a job at the university and has Sena as a lover all these years. When she suddenly decides to leave the relationship, it comes as a shock to him, and he desperately wants to know the reason. After a series of reconciliations and separations, he finally finds out and briefly has another apparently blissful relationship with Silva.