The back streets of Montmartre

I read a book a long time ago that said , "Happy people don't listen to
music " I was a little surprised , but I thought at the time that it might be . I recently read a Manga called " Monster " that says , " As a person,
it's a blessing to be able to feel sad when you're sad " This world is full of sad happiness . That's why it's full of music . That's how I feel when I
sing now . Please listen to it !