Contract Demon Original Soundtrack
| Composed by | NomnomNami |
| Published by | NomnomNami |
| Release type | Game Soundtrack - Official Release |
| Format | 1 Digital - 8 tracks |
| Release date | March 31, 2019 |
| Duration | 00:12:42 |
| Genres |
| 1 | netherworld mischief (title ver.) | 00:42 | |
| 2 | friend ritual | 01:53 | |
| 3 | play together | 01:30 | |
| 4 | sacroffice | 01:15 | |
| 5 | netherworld mischief | 02:06 | |
| 6 | weakness | 01:49 | |
| 7 | after dusk | 01:49 | |
| 8 | together at last | 01:38 |
