Until fragrance,
I think
If you're asking where you can find it withing the game, It would be at the part where you can choose who to hang out with, like Jørgen and Travis, then if you leave without saying much to them you can head into Mikko's room and he'll show you the song.
If your asking like within game files, that's not my area of expertise, as I'm on mobile
It is on Bandcamp, you can find it here: https://djsaint-hubert.bandcamp.com/track/until-fragrance