{{MusicArticle
| titlejp     =遊穹 {{lang|en|U-KYU}}
| titlejprom  =Ukyuu
| titleen     =Playing Sky
| group       =[[C-CLAYS]]
| groupCat    =C-CLAYS
| image       =TOCD-0015.jpg
| banner      =TOCD-0015 banner.jpg
| released    =2009-08-15
| tracks      =11
| website     =[http://www.c-clays.com/03_pro/u-kyu/U-kyu.html Link]
| length      =53:09
| catalogno   =TOCD-0015
| convention  =Comiket 76
| producer    =
| illustrator =[http://fancyfantasia.jp/ {{植田亮}}]
| designer    =[http://winfanworks.com/ WINFANWORKS]
| arranger    =K2
: tsunamix
: W*M
: {{lang|ja|美有耳虚無頭}}
: {{創 無頼人}}
: {{桐箪笥}}
: tsunamix
| lyricist    =W*M
: {{天音未優}}
: {{lang|ja|美有耳虚無頭}}
: {{創 無頼人}}
| vocalist    ={{小峠 舞}}
: {{双月 彩}}
: {{lang|ja|仲篠田 麦}}
; Production & Direction
:{{lang|ja|綾瀬　孝}}
| other_staff =
; Guitar (Tracks 05, 08, 11)
:Musicoms.com
; Vocal Recording Direction
:W*M
:tsunamix
:{{lang|ja|美有耳虚無頭}}
; Mix (Tracks 04, 11)
:K2

| description =It features vocal and instrumental arrangements of themes from ''[[Story of Eastern Wonderland]]'', ''[[Perfect Cherry Blossom]]'', ''[[Imperishable Night]]'', ''[[Mountain of Faith]]'', ''[[Subterranean Animism]]'', ''[[Undefined Fantastic Object]]'' and ''[[Retrospective 53 minutes]]''.
| tracklist   =

* {{Track|01|Whirling Truth|04:37|lyrics=Lyrics: Whirling Truth}}
** arrangement: K2
** lyrics: W*M
** vocals: {{小峠 舞}}
** vocal recording direction: W*M
** original title: {{lang|ja|厄神様の通り道 ～}} Dark Road
** source: {{MoF}}

* {{Track|02|{{lang|ja|哀しみに霞む摩天楼}}|04:49|lyrics=Lyrics: 哀しみに霞む摩天楼}}
** ''Skyscraper Blurred by Sadness''
** arrangement: tsunamix
** lyrics: {{天音未優}}
** vocals: {{双月 彩}}
** vocal recording direction: tsunamix
** original title: {{lang|ja|神々が恋した幻想郷}}
** source: {{MoF}}

* {{Track|03|Heavy Sunshine|05:57}}
** arrangement: W*M
** original title: {{lang|ja|暗闇の風穴}}
** source: {{SA}}

* {{Track|04|Halo glare|04:35|lyrics=Lyrics: Halo glare}}
** arrangement: W*M
** lyrics: W*M
** vocals: {{小峠 舞}}
** vocal recording direction: W*M
** mix: K2
** original title: {{lang|ja|夜雀の歌声 ～}} Night Bird
** source: {{IN}}

* {{Track|05|Country Sky|03:58}}
** arrangement: {{lang|ja|美有耳虚無頭}}
** guitar: Musicoms.com
** original title: {{lang|ja|青空の影}}
** source: {{UFO}}

* {{Track|06|{{lang|ja|黒髪のアマンダ}}|03:49}}
** ''Black-haired Amanda''
** arrangement: {{創 無頼人}}
** original title: {{lang|ja|千年幻想郷 ～}} History of the Moon
** source: {{IN}}

* {{Track|07|The sea of the solar eclipse|04:47}}
** arrangement: {{桐箪笥}}
** original title: 53{{lang|ja|ミニッツの青い海}}
** source: {{R53m}}

* {{Track|08|White Moon|05:20|lyrics=Lyrics: White Moon}}
** arrangement: {{lang|ja|美有耳虚無頭}}
** lyrics: {{lang|ja|美有耳虚無頭}}
** vocals: {{lang|ja|仲篠田 麦}}
** guitar: Musicoms.com
** vocal recording direction: {{lang|ja|美有耳虚無頭}}
** original title: {{lang|ja|竹取飛翔 ～}} Lunatic Princess
** source: {{IN}}

* {{Track|09|EPIPHYLLUM OXYPETALUM|04:30}}
** arrangement: tsunamix
** original title: {{lang|ja|狂気の瞳 ～}} Invisible Full Moon
** source: {{IN}}

* {{Track|10|{{lang|ja|朽葉色の空}}|04:59|lyrics=Lyrics: 朽葉色の空}}
** ''Sky the Colour of Withered Leaves''
** arrangement: {{創 無頼人}}
** lyrics: {{創 無頼人}}
** vocals: {{lang|ja|仲篠田 麦}}
** guitar: Musicoms.com
** vocal recording direction: {{lang|ja|美有耳虚無頭}}
** original title: {{lang|ja|ティアオイエツォン}}(withered leaf)
** source: {{PCB}}

* {{Track|11|Marble Hearted|05:48|lyrics=Lyrics: Marble Hearted}}
** arrangement: W*M
** lyrics: W*M
** vocals: {{小峠 舞}}
** vocal recording direction: W*M
** mix: K2
** original title: Complete Darkness
** source: {{SoEW}}

| review      =
}}