Here are the credits appearing in the credits:
https://i.imgur.com/miZ7H6Y.png
Note that this is from the english fantranslation, so there might be some issues.
For some reason, Syntaro Jinbo and Yoh Ohyama are uncreditted. Here are the reformatted credits.
* = Uncreditted, creditted in FPBD-0073
Credits
Sound Production
5ZIZZ
Overall Sound Production
Shikura Chiyomaru
Sound Direction
Kanaya Takefumi
BGM Composers
Toshimichi Isoe
Takeshi Abo
Yoh Ohyama*
Syntaro Jimbo*
BGM Arrangers*
Toshimichi Isoe
Takeshi Abo
Yoh Ohyama
Syntaro Jimbo
Sound Production: Ryousuka Naya
Casting: Tomoyuki Hamada
Recording: Naoya Tanaka
Naoko Touda
Yuriko Kiyomoto
Toshiaki Seino
Recording Assistants: Naoya sanda
Yuuichi Morita
Naoki Okabe
Ryouta Miyabayashi
Voice Data Work: Tetsuya Murai
Recording Studio: Studio Mouse
Three S Studio
Sound Effects: Wara Works Kouwa Ebisu
Takeshi Abo
Song Credits
Find the blue (Opening Theme Song)
Vocals: Kanako Ito
Lyrics and Composition: Chiyomaru Shikura
Composition and Arrangement: Toshimichi Isoe
Desire Blue sky (Ending Theme Song)
Vocals: Kanako Ito
Lyrics: Ikuko Ebata
Composition and Arrangement: Toshimichi Isoe
Cry (Ending Theme Song)
Vocals: Kanako Ito
Lyrics: Ikuko Ebata
Composition and Arrangement: Toshimichi Isoe
Gladioul (Ending Theme Song)
Vocals: Phantasm (FES [CV: Yui Sakakibara])
Lyrics: Chiyomaru Shikura
Composition and Arrangement: Hayashi Tatsushi
A Contract of Blood to Seal Our Sin (Insert Song)
Vocals: Phantasm (FES [CV: Yui Sakakibara])