{{MusicArticle
| titlejp     ={{lang|en|UNDER FEST -}}アンダー・フェスト{{lang|en|-}}
| titlejprom  =
| titleen     =UNDER FEST
| group       =[[xi-on]]
| groupCat    =xi-on
| groupCat2   =
| groupCat3   =
| groupCat4   =
| released    =2017-05-07
| convention  =Reitaisai 14
| tracks      =8
| length      =30:16
| catalogno   =XITH-0027
| genre       ={{Genre|Instrumental}}, {{Genre|Orchestral}}
| website     =[http://xion-music.com/underfest.html Link]
| image       =XITH-0027.jpg
| banner      =
| arranger    =[[xi-on]]
; Guest Arrangement
:Yukky
:{{lang|ja|あかみ}}
| lyricist    =
| vocalist    =
| producer    =
| illustrator ={{lang|ja|もにかにこ}}
| designer    =
| masterer    =
| other_staff =

| description =It features instrumental arrangements of themes from ''[[Subterranean Animism]]''.

| tracklist   =

*{{Track|01|{{lang|ja|暗闇の風穴}}|2:51}}
** ''The Dark Blowhole''
**arrangement: [[xi-on]]
**original title: {{lang|ja|暗闇の風穴}}
**source: {{SA}}

*{{Track|02|{{lang|ja|少女さとり ～}} 3rd eye|3:59}}
** ''Satori Maiden ~ 3rd Eye''
**arrangement: [[xi-on]]
**original title: {{lang|ja|少女さとり　～}} 3rd eye
**source: {{SA}}

*{{Track|03|{{lang|ja|ハートフェルトファンシー}}|4:00}}
** ''Heartfelt Fancy''
**arrangement: Yukky
**original title: {{lang|ja|ハートフェルトファンシー}}
**source: {{SA}}

*{{Track|04|{{lang|ja|ラストリモート}}|3:51}}
** ''Last Remote''
**arrangement: [[xi-on]]
**promotional video: [https://www.youtube.com/watch?v=CQ8CMGHbydQ Youtube video] ([http://www.nicovideo.jp/watch/sm31068909 niconico video])
**original title: {{lang|ja|ラストリモート}}
**source: {{SA}}

*{{Track|05|{{lang|ja|死体旅行 ～}} Be of good cheer!|5:40}}
** ''Corpse Voyage ~ Be of good cheer!''
**arrangement: Yukky
**original title: {{lang|ja|死体旅行　～}} Be of good cheer!
**source: {{SA}}

*{{Track|06|{{lang|ja|華のさかづき大江山}}|3:31}}
** ''A Flower-Studded Sake Dish on Mt. Ooe''
**arrangement: {{lang|ja|あかみ}}
**original title: {{lang|ja|華のさかづき大江山}}
**source: {{SA}}

*{{Track|07|{{lang|ja|廃獄ララバイ}}|4:04}}
** ''Lullaby of Deserted Hell''
**arrangement: [[xi-on]]
**original title: {{lang|ja|廃獄ララバイ}}
**source: {{SA}}

*{{Track|08|{{lang|ja|エネルギー黎明 ～}} Future Dream…|2:19}}
** ''Energy Daybreak ~ Future Dream...''
**arrangement: [[xi-on]]
**original title: {{lang|ja|エネルギー黎明　～}} Future Dream...
**source: {{SA}}

| notes       =
| review      =
| print_references =
}}