BGM composed by Peak A Soul+ (Hijiri Anze, Takago Azuma, Akiyo Toda).
Opening Theme "Snowflake
~twinkle crystal dream~"
Performer: mao
Composer: rino
Arranger: Hijiri Anze
Lyricist: Yoshie Isogai
Ending Theme 1 "Heartstrings"
Performer: mao
Composer: Hijiri Anze
Arranger: Hijiri Anze
Lyricist: Yoshie Isogai
Ending Theme 2 "Beside You"
Performer: SHOJI
Composer: rino
Arranger: Naoyuki Osada
Lyricist: Yoshie Isogai
Ending Theme 3 "祈りめぐりて (Inori Megurite)"
Performer: Kaori Oda
Composer: Hijiri Anze
Arranger: Naoyuki Osada
Lyricist: Yoshie Isogai
Album was composed by Akiyo Toda / Hijiri Anze / Peak a Soul+ / rino / Takago Azuma and was released on December 27, 2017. Soundtrack consists of 16 tracks tracks with duration over . Album was released by Team Entertainment.
CD 1
| 1 | Snowflake ～twinkle crystal dream～ | | |
| 2 | 白銀の奇跡 | | |
| 3 | 冬の世界 | | |
| 4 | いつもそばには | | |
| 5 | 真実への道 | | |
| 6 | 棄てられたモノの嘆き | | |
| 7 | 激震 | | |
| 8 | 無限の世界 (Vocal ver.) | | |
| 9 | 無限の世界 | | |
| 10 | Heartstrings | | |
| 11 | Beside You | | |
| 12 | 祈りめぐりて | | |
| 13 | Snowflake ～twinkle crystal dream～ (Instrumental) | | |
| 14 | Heartstrings (Instrumental) | | |
| 15 | Beside You (Instrumental) | | |
| 16 | 祈りめぐりて (Instrumental) | | |
