It's playing on acoustic guitar, and a male voise sings in french (or english i'm not sure). How I remember, it's an old song and it's about love/romantic. In a slowly tempo. It's a very beatiful song.
https://www.youtube.com/watch?v=f8UQKHMyhBw Here I have a link with a little part of it (0:00-0:18 just the beginning). Thanks!