Fantastic 31 Days Original Soundtrack
| Published by | vap, VAP Inc. |
| Catalog number | HISN-02773 |
| Release type | Game Soundtrack - Official Release |
| Format | 1 Digital - 15 tracks |
| Release date | March 28, 2022 |
| Genres |
| 1 | サヨウナラのその前に | ||
| 2 | Ordinary Tuesday - 椿木宙のテーマ - | ||
| 3 | 人類滅亡の危機 | ||
| 4 | #bff | ||
| 5 | Troublesome Wednesday - 観月未希のテーマ - | ||
| 6 | もう一人の自分 | ||
| 7 | Fake Smile Thursday - 渡会実のテーマ - | ||
| 8 | 笑顔の多い日々 | ||
| 9 | Rainy Friday - 金島陽子のテーマ - | ||
| 10 | Bad Timing | ||
| 11 | MiscalculationsC12 | ||
| 12 | Gloomy Monday - 佐藤開のテーマ - | ||
| 13 | 地球最後の日 | ||
| 14 | Put Your Hands Up | ||
| 15 | 見晴らしの良い丘で |
