{{MusicArticle
| titlejp     =
| titlejprom  =
| titleen     =4 tracing heart
| group       =[[Retractable]]
| groupCat    =Retractable
| groupCat2   =
| groupCat3   =
| groupCat4   =
| released    =2016-05-08
| convention  =Reitaisai 13
| tracks      =4
| length      =18:11
| catalogno   =N/A
| genre       ={{Genre|Instrumental}}, {{Genre|Chiptune}}, {{Genre|Post-Rock}}
| website     =[http://chip.main.jp/Retractable/4/ Link]
| image       =4 tracing heart.jpg
| banner      =4 tracing heart_banner.jpg
| banner_res  =x60
| arranger    ={{lang|ja|つきいち}}
; Illustration & Design
:{{lang|ja|飛花}} ([[pikapika]], [http://www.pixiv.net/member.php?id=2376977 pixiv])
| lyricist    =
| vocalist    =
| producer    =
| illustrator =
| designer    =
| masterer    =
| other_staff =
; Mix & Mastering
:{{lang|ja|つきいち}}

| description =It features instrumental arrangements of themes from ''[[Embodiment of Scarlet Devil]]'', ''[[Subterranean Animism]]'', ''[[Hopeless Masquerade]]'' and ''[[Magical Astronomy]]''. Track 01 "Balance" was uploaded by {{lang|ja|つきいち}} to promote the album's release and can be viewed on [http://www.nicovideo.jp/watch/sm28912871 niconico video] <sup>(Requires account)</sup>.

| tracklist   =

*{{Track|01|Balance|02:56}}
**arrangement: {{lang|ja|つきいち}}
**original title: {{lang|ja|天空のグリニッジ}}
**source: {{MA}}

*{{Track|02|Chimera tech for trace|05:14}}
**arrangement: {{lang|ja|つきいち}}
**original title: {{lang|ja|ハートフェルトファンシー}}
**original title: {{lang|ja|ハルトマンの妖怪少女}}
**source: {{SA}}

*{{Track|03|Therapy|05:11}}
**arrangement: {{lang|ja|つきいち}}
**original title: {{lang|ja|亡失のエモーション}}
**source: {{HM}}

*{{Track|04|Wildfire|04:50}}
**arrangement: {{lang|ja|つきいち}}
**original title: U.N.{{lang|ja|オーエンは彼女なのか？}}
**source: {{EoSD}}

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}}