Oukyuu Yasoukyoku Original Drama CD - Cain-sama HOW TO Kouza
| Composed by | Tsuyoshi Kaneko |
| Published by | Gekka Hyoujin (distributed by Messe Sanoh) |
| Catalog number | MESSE-169 |
| Release type | Game Soundtrack - Promo / Enclosure |
| Format | 1 CD - 10 tracks |
| Release date | September 22, 2005 |
| Duration | 00:30:01 |
| Genres |
Game Sound: Tsuyoshi Kaneko, Yutaka Matsumiya
M01 - Opening Theme Song
Lyrics: Tsuyoshi Kaneko, Yutaka Matsumiya
Music: Tsuyoshi Kaneko
Vocal: Marie
M02 - Drama
M03-M10 - Character BGM
M01 - Opening Theme Song
Lyrics: Tsuyoshi Kaneko, Yutaka Matsumiya
Music: Tsuyoshi Kaneko
Vocal: Marie
M02 - Drama
M03-M10 - Character BGM
| 1 | Forbidden Nocturne | 04:46 |  |
| 2 | Cain-sama HOW TO Kouza | 12:30 | |
| 3 | BGM -Cain- | 01:33 | |
| 4 | BGM -Jake- | 01:38 | |
| 5 | BGM -Edgar- | 01:34 | |
| 6 | BGM -Liou- | 01:33 | |
| 7 | BGM -Astrud- | 01:43 | |
| 8 | BGM -Vincent- | 01:38 | |
| 9 | BGM -Roedel- | 01:34 | |
| 10 | BGM -Princess Room- | 01:32 | |
