Music by
Ryo Mizutsuki (1,4,7,10,11,12,13,15)
Shinji Orito (2,3,5,6,8,9,14)
M-16 - Opening Theme
Performer: Ayaka Kitazawa
Composer: Shinji Orito
Arranger: Yuichiro Tsukagoshi (NanosizeMir)
Lyricist: Kai
M-17 - Ending Theme
Performer: Haruka Shimotsuki
Composer: Tomohiro Takeshita
Arranger: Meeon
Lyricist: Kai
First Press Bonus for Harmonia Limited Edition. The package also includes Harmonia Piano Arrange Album "teneritas" (KSLA-0135).
Album was composed by Kiyoko Yamada / Shinji Orito / Tomohiro Takeshita and was released on May 26, 2017. Soundtrack consists of 17 tracks tracks with duration over about 60 minutes. Album was released by Key Sounds Label.
CD 1
| 1 | Terrarum | 04:30 | |
| 2 | Oppidum | 03:08 | |
| 3 | Vitae | 03:11 | |
| 4 | Cantus | 01:47 | |
| 5 | Library | 03:01 | |
| 6 | Tristitia | 05:05 | |
| 7 | Risu | 03:21 | |
| 8 | Rruinis | 04:40 | |
| 9 | Pecado | 04:44 | |
| 10 | Scindet | 03:46 | |
| 11 | Reditum | 03:38 | |
| 12 | Caveam | 02:06 | |
| 13 | Harmonia | 03:00 | |
| 14 | Spero | 02:21 | |
| 15 | Halitus | 02:15 | |
| 16 | 届けたいメロディ Short Ver | 02:24 | |
| 17 | 永遠の星へ | 05:51 | |
