Soundtrack query! Would like help to identify a song.

There is one piano piece that is played for a lot of the melancholic parts of the series.

I know there are a few but the one that hit me the most is the BGM for the Life Link with Sayama in Infinite Wealth. Do you know the name of the piano piece that is played during her conversation with Date? It is also played in other cutscenes as well.

For easy reference, here is a youtube link for that scene.

https://www.youtube.com/watch?v=cCKlOxcBtvY