{{MusicArticle
| titlejp     =背徳姉妹 ～紅に染まる片翼～
| titlejprom  =Haitoku Shimai ~Kurenai ni Somaru Katayoku~
| titleen     =Immoral Sisters ~Damaged Wings Dyed in Scarlet~
| group       =[[Innocent Key]]
| groupCat    =Innocent Key
| image       =IK-10.jpg‎
| banner      =IK-10_banner.png
| released    =2009-06-21
| convention  =Touhou Suukeisai
| tracks      =9
| length      =54:55
| catalogno   =IK-10
| website     =[http://www.innocent-key.com/discog.php?page=10 Link]
| arranger    =yohine
: gak yohine
: {{溝口ゆうま}}
| masterer    =
| lyricist    ={{lang|ja|溝口ゆうま}}
| vocalist    =Nimo  
: {{大瀬良あい}}
: {{ココ}}
: {{樹詩音}}
: {{lang|ja|奏音比奈}}
| producer    =yohine
| illustrator =manabi
| designer    =水瀬 修 ([[DROP DEAD!!]])
| masterer    =yohine

| description =It features vocal and instrumental arrangements of themes from ''[[Embodiment of Scarlet Devil]]'' as well as several drama tracks.

| tracklist   =
*{{Track|01|{{lang|ja|絶望と目覚め}} ({{lang|ja|ドラマ第一幕}})|06:18}}

*{{Track|02|Immoral Sister{{lang|ja|～紅に染まる片翼}}|04:51|lyrics=Lyrics: Immoral Sister～紅に染まる片翼}}
** arrangement: yohine
** lyrics: {{溝口ゆうま}}
** vocals: Nimo, {{ココ}}, {{大瀬良あい}}
** original title: {{lang|ja|紅楼　～}} Eastern Dream...
** original title: {{lang|ja|ツェペシュの幼き末裔}}
** original title: {{lang|ja|魔法少女達の百年祭}}
** source: {{EoSD}}

*{{Track|03|Endless Love {{lang|ja|～交錯する禁忌}}|05:35|lyrics=Lyrics: Endless Love ～交錯する禁忌}}
** arrangement: gak, yohine
** lyrics: {{溝口ゆうま}}
** vocals: Nimo, {{ココ}}
** original title: {{lang|ja|亡き王女の為のセプテット}}
** source: {{EoSD}}

*{{Track|04|Existence Vision {{lang|ja|～見据えた真実}}|04:39|lyrics=Lyrics: Existence Vision ～見据えた真実}}
** arrangement: {{溝口ゆうま}}
** lyrics: {{溝口ゆうま}}
** vocals: {{樹詩音}}
** original title: {{lang|ja|月時計　～ ルナ・ダイアル}}
** source: {{EoSD}}

*{{Track|05|{{lang|ja|花びらと翼 （ドラマ第二幕}}）|10:14}}

*{{Track|06|Significant point {{lang|ja|～加速する崩壊}}|3:24|lyrics=Lyrics: Significant point ～加速する崩壊}}
** arrangement: yohine
** lyrics: {{溝口ゆうま}}
** vocals: Nimo, {{lang|ja|奏音比奈}}
** original title: U.N.{{lang|ja|オーエンは彼女なのか？}}
** source: {{EoSD}}

*{{Track|07|{{lang|ja|紅い月の日 （ドラマ第三幕）}}|07:50}}

*{{Track|08|Jewelry Magic (Instrumental)|05:12}}
** arrangement: yohine
** original title: {{lang|ja|ラクトガール　～ 少女密室}}
** source: {{EoSD}}
** original title: {{lang|ja|ヴワル魔法図書館}}

*{{Track|09|Memories of Scarlet {{lang|ja|紅の記憶}}|06:52}}
** arrangement: yohine

*{{Track|10|Immoral Sister{{lang|ja|～紅に染まる片翼}} -Instrumental-|}}
** arrangement: yohine
** original title: {{lang|ja|紅楼　～}} Eastern Dream...
** original title: {{lang|ja|ツェペシュの幼き末裔}}
** original title: {{lang|ja|魔法少女達の百年祭}}
** source: {{EoSD}}

*{{Track|11|Endless Love {{lang|ja|～交錯する禁忌}} -Instrumental-|}}
** arrangement: gak, yohine
** original title: {{lang|ja|亡き王女の為のセプテット}}
** source: {{EoSD}}

*{{Track|12|Existence Vision {{lang|ja|～見据えた真実}} -Instrumental-|}}
** arrangement: {{溝口ゆうま}}
** original title: {{lang|ja|月時計　～ ルナ・ダイアル}}
** source: {{EoSD}}

*{{Track|13|Significant point {{lang|ja|～加速する崩壊}} -Instrumental-|}}
** arrangement: yohine
** original title: U.N.{{lang|ja|オーエンは彼女なのか？}}
** source: {{EoSD}}

== Notes ==
*Every track on the CD is an arrangement of a song from ''[[Embodiment of Scarlet Devil]]''.
*Tracks 1, 5, and 7 are drama tracks.
*Track 8 is an instrumental version of Jewelry Magic, from [[東方楼蘭]].

*Cast Members
**Remilia Scarlet: Nimo
**Flandre Scarlet: {{ココ}}
**Sakuya Izayoi: {{樹詩音}}
**Flandre Scarlet: {{lang|ja|奏音 比奈}}
**Narrator: {{大瀬良あい}}
| review      =
}}

[[es:背徳姉妹 ～紅に染まる片翼～]]