After Shinji and Asuka have been in the past for a few days, Asuka asks Shinji to play their daughter's song on his cello.
Asuka: Please... Please play her – her happy song! I need to hear it again!
Shinji: I'm sorry. I- I don't think I can. It is supposed to be a happy song after all. But now it wouldn't bring anyone happiness – because it was hers.
Asuka: It would ease my sadness! I have nothing else from her! I don't have photos of her, I don't have one of her drawings, I don't have Kiko, I- I don't have... *sob* Please. That song... that song is all there's left from her.
Shinji: I'm sorry.