I can't find the track anywhere on youtube, but there's also a sad/strings version of the Silver Spoon anime's main theme that makes me cry like a baby, because it's played over the scene where
one of the characters loses their family farm and is forced to sell all their animals
.And in not-anime, Zelda's Lullaby from the LoZ games also makes me cry now. It's always been my favorite piece and the Skyward Sword version of it is so pretty and sad ;___;