23-song soundtrack, included with the game's standard and limited editions.
Features 10 short versions of vocal songs and 13 BGM tracks from the game.
Vocal Tracks (Tentative tracklist order):
1. Artist: KAF
Lyrics / Composition & Arrangement: Iori Kanzaki
2. Artist: CIEL
Lyrics / Composition & Arrangement: Tota Kasamura
3. Artist: koko
Lyrics / Composition & Arrangement: Parsley Onuma
4. Artist: Harusaruhi
Lyrics / Composition & Arrangement: Hifumi
5. Artist: Isekaijoucho
Lyrics / Composition & Arrangement: rionos
6. Artist: RIM
Lyrics / Composition & Arrangement: mao sasagawa
7. Artist: koko
Lyrics / Composition & Arrangement: Parsley Onuma
8. Artist: Harusaruhi
Lyrics / Composition: Takayan
Arrangement: Parsley Onuma
9. Artist: Harusaruhi×Isekaijoucho
Lyrics / Composition & Arrangement: NILFRUITS
10. Artist: koko
Lyrics / Composition & Arrangement: Kanaria
BGM Tracks (Tentative tracklist order):
11~23.
Composer: Tsukasa Masuko
11.
Violin: Hiroyuki Koike
Guitar: Shoichi Matsushima
Drums: Takuto Okayama
Piano: Jimmy Iwasaki
12.
Violin: Hiroyuki Koike
Guitar: Shoichi Matsushima
Drums: Takuto Okayama
13.
Violin: Hiroyuki Koike
Drums: Takuto Okayama
Piano: Jimmy Iwasaki
14.
Violin: Hiroyuki Koike
15.
Piano: Jimmy Iwasaki
16.
Violin: Hiroyuki Koike
Drums: Takuto Okayama
Piano: Jimmy Iwasaki
17.
Drums: Takuto Okayama
Piano: Jimmy Iwasaki
18.
Violin: Hiroyuki Koike
Альбом был написан Iori Kanzaki / mao sasagawa / NILFRUITS / Parsley Onuma / rionos / Takayan / Tota Kasamura / Цукаса Масуко и вышел 14 октября 2021 года. На саундтрек попало 23 композиции. Подборка является компиляцией оригинальной музыки. Выпуском пластинки занимался лейбл FuRyu.
CD 1
| 1 | ニヒル | | |
| 2 | 君の望み、君の願い | | |
| 3 | Dear | | |
| 4 | Gunpowder | | |
| 5 | 何億光年の孤独 | | |
| 6 | あおいこわす | | |
| 7 | ASH | | |
| 8 | Pleiades | | |
| 9 | 愛厭奇縁 | | |
| 10 | 強欲 | | |
| 11 | 静寂ナル咆哮 | | |
| 12 | 卑ノ条理 | | |
| 13 | 崩壊スル恻惰 | | |
| 14 | 耳語ノ誘ヒ | | |
| 15 | 幢幢タル胸懷 | | |
| 16 | 新奇ナ傾向 | | |
| 17 | 子午ノ日溜 | | |
| 18 | 黄昏ノ人口 | | |
| 19 | (no title available) | | |
| 20 | (no title available) | | |
| 21 | (no title available) | | |
| 22 | (no title available) | | |
| 23 | (no title available) | | |
