9 Border Original Soundtrack
| Published by | Anchor Records, Sony Music Solutions Inc. |
| Catalog number | UZCL-2285 |
| Release type | Game Soundtrack - Official Release |
| Format | 1 CD - 30 tracks |
| Release date | June 05, 2024 |
| Genres |
Composer & Arranger: jizue
M-28
Vocals: Mizuki Ohira
M-28
Vocals: Mizuki Ohira
| 1 | 9ボーダー Main Theme | ||
| 2 | my border | ||
| 3 | 三姉妹のテーマ | ||
| 4 | first memory | ||
| 5 | dolore | ||
| 6 | anxiety | ||
| 7 | Waltz in Kiyosumi | ||
| 8 | A New Morning | ||
| 9 | The puzzle of life | ||
| 10 | success | ||
| 11 | 前を向いて歩こう | ||
| 12 | おおば湯 | ||
| 13 | mysterious | ||
| 14 | light flower | ||
| 15 | 切ない恋心 | ||
| 16 | 心の平穏 | ||
| 17 | fashion | ||
| 18 | Walking in the sun | ||
| 19 | rage | ||
| 20 | Awakening | ||
| 21 | Nana | ||
| 22 | Hatsumi | ||
| 23 | Mutsuki | ||
| 24 | Music in a Public Bath | ||
| 25 | 大庭家の日常 | ||
| 26 | 幸せになりたい | ||
| 27 | TO.KI.ME.KI | ||
| 28 | Last Year | ||
| 29 | 9ボーダー Main Theme -Acoustic Guitar ver.- | ||
| 30 | 9ボーダー Main Theme -Piano & Strings ver.- |
