M-01 - Drama
Cast: 筑波 美奈乃: 若宮みさき
M-02~10 - Game Soundtrack
BGM: Sound Resource [サウンドリソース]
Bonus for preordering OnlyOne+R ~Higyaku no Mermaid Minano~ (JAN: 4571159070115), Special Package Edition (JAN: 4571159070122).
Album was composed by and was released on August 20, 2004. Soundtrack consists of 10 tracks tracks with duration over about 45 minutes. Album was released by BLACK GLOBE.
CD 1
| 1 | オンリーワン＋R ～美奈乃先生 恥辱の教壇～ | 27:14 | |
| 2 | Dog days | 02:14 | |
| 3 | Uneasy/Anger/Dislike | 01:22 | |
| 4 | Chaos Mind | 02:09 | |
| 5 | A day rises and a day sinks again. awaiting -darkness | 01:56 | |
| 6 | The foppish face | 01:49 | |
| 7 | Moonlight | 02:04 | |
| 8 | "Bye-bye" Petty every day | 01:45 | |
| 9 | brittle heart | 01:46 | |
| 10 | The end of a tale | 02:07 | |
