Recherche "sad air" in josephine ..

Good evening, I know it's late, I'm sorry !! ^^ But Joséphine, Ange Gardien was on TV earlier and actually there’s always this little sad tune during the "emotional sequence" ^^ but I don’t know if it’s part of a sad song or just a piano piece for the show !!! Because it’s always there in every episode !! Maybe you know what I'm talking about and have an idea of where to find it ??? I really don’t at all except here ^^ thank you in advance !!!