Please help!
There is a song that always comes at the end of this show from Amazon, called "Prime Japan", it sounds like an old song but perhaps it's just the style. Reminds of Nat King Cole or Sinatra (also, it's slow and blues/golden age like) but I think it's neither. The lyrics start with:

"I knew an angel fell to earth, the way that angels sometimes do....(etc) makes me blue...(etc)...that's why I think how lucky I must be, lucky-lucky me that I found you"

I searched everywhere and in different languages but still couldn't find anything! If someone knows it, please do tell what it is.
Here is link to the show but in order to see the end one needs the amazon prime membership or pay for the show separately. The song comes always at the last few minutes as a closing!