>>527602940
Choosing a favourite track is too hard... I'd say the piano versions of Automne's OP and ED but that feels like cheating.
A couple I particularly liked:
https://files.catbox.moe/0uzeha.mp3
https://www.youtube.com/watch?v=YdWHF-y_45c
https://www.youtube.com/watch?v=iUaR64nlahc
https://files.catbox.moe/ywq0r4.mp3
https://files.catbox.moe/16pzar.mp3
https://files.catbox.moe/4371lp.mp3