{{MusicArticle
| titleen     =C88 Omake CD
| titlejprom  =C88 kaijou gentei omake CD
| titlejp     = C88会場限定おまけCD
| group       =[[暁Records|Akatsuki Records]]
| groupCat    =Akatsuki Records
| released    =2015-08-14
| convention  =Comiket 88
| tracks      =2
| length      =09:45
| catalogno   =DRCD-0034
| genre       ={{Genre|Vocal}}, {{Genre|Rock}}
| website     =[http://akatsuki-records.com/drcd0010.html Link]
| image       =C88会場限定おまけCD封面.jpg
| caption     =Pictured: [[Kagiyama Hina]] 
| banner      =
| arranger    =Stack Bros.
| lyricist    =ACTRock
| vocalist    =Stack

| description =It is an event-limited limited album featuring vocal arrangements of themes from [[Embodiment of Scarlet Devil]], [[Ghostly Field Club]] and [[Magical Astronomy]]. Its tracks were later re-released on [[オマケベストなのか～その①]].

| tracklist   =
*{{Track|01|{{lang|ja|へえー、そーなんですかぁ？教えてあげないっ！}}|03:21|lyrics=Lyrics: へえー、そーなんですかぁ？教えてあげないっ！}}
**''Eeh, Is That So? Why Won't You Tell Me!''
**arrangement: 	ACTRock
**lyrics: ACTRock
**vocals: Stack
**original title: {{lang|ja|妖魔夜行}}
**source: {{EoSD}}

*{{Track|02|{{lang|ja|二人の結晶}}-INNOCENCE- {{lang|ja|ピアノ弾き語り}}Ver|05:46|lyrics=Lyrics: 二人の結晶-INNOCENCE-}}
**''Our Crystal -INNOCENCE- Piano Solo Ver''
**arrangement: 	ACTRock
**re-arrangement: Stack Bros.
**lyrics: ACTRock
**vocals: Stack
**original title: {{lang|ja|少女秘封倶楽部}}
**original title: {{lang|ja|魔術師メリー}}
**original title: {{lang|ja|古の冥界寺}}
**source: {{GFC}}
**original title: {{lang|ja|大空魔術　～}} Magical Astronomy
**original title: {{lang|ja|天空のグリニッジ}}
**source: {{MA}}
**original title: {{lang|ja|ヒロシゲ}}36{{lang|ja|号}} ～ Neo Super-Express
**source: {{R53m}}
**original title: {{lang|ja|科学世紀の少年少女}}
**source: {{CoSD}}

}}