Edit: Found this: https://brianna-lei.tumblr.com/post/166727493239/butterfly-soup-asks-16
Has a link to every single song and also other things.
You can find information in “About”, these are the music names and composers:
“Thought Projection”, “Holding Your Breath”, and “Thoughts of You” by Ketsa
“Romaras”, “Blooming”, and “Side by Side” by Miltata
“Valar Morghulis” by Bloodgod
“Flame of Love” by YOSHI
“Overflowing” by Tatsuya Kato
“My Heart Will Go On - Recorder By Candlelight” by Matt Mulholland
Title song: “Miyauchi Yuri/110515 (miltata remix)” by
Miltata
Credits song: “Calling Project 2” by .que