Que Pasará Mañana by José Luis Perales
Not sure what the song means, but it sounds like a girls is asking him what will happen tomorrow when he leaves who will she tell that she knows now hr is far away. Then he replies to her " i will tell you in a trembling voice that time will hurry and that day we await will arrive turn off the lights before night leaves us"It could be interpreted as lovers or as a child parent coversation.