So in episode 5 around 46 minutes in a song starts playing for around a minute. I want to know if anyone can tell me the name of that song. At first I thought it would come out in the ost but the drama ended and no a single word was mentioned about it. I've tried to look for it multiple times with no luck. Also nobody seems to have notice this song as I ,despite researching for a while, have not seen a single reference to it. I have come to believe this song came out separately from the ost and they bought the rights or asked for permission to play it in the show. That is all, if you know the name please let me know and I'll be eternally grateful. 

Edit: song duration (46:17 - 47:59) episode 5