I was thinking about posting roughly the same question on here the other day, because music is one of the only things that helps me keep memories. I remember very little of my life, and my brain is still constantly deleting as much as it can as time goes on. I'm assuming it's a trauma response from my childhood that decided to stick around. However, music seems to really lock shit in for me. I was very pleasantly surprised to see you say Explosions In The Sky, seems like nobody ever knows them. I love that whole album, hearing it for the first time is a vibrant memory for me, but It's Natural to be Afraid and So Long, Lonesome really hit me the most now. One of these days I'll actually listen to more of their music. I could go on and on and list a lot of music, but this is already really long. I mentioned a Feist song in another comment, but I think the closest thing to an answer to your specific question for me is Clark - The Autumnal Crush. Had a good cry to it yesterday actually.