{{MusicArticle
| titlejp     =ふたつの子午線 {{lang|en|Orthogonal parallel line}}
| titleen     =Our Meridian Orthogonal parallel line
| group       =[[dBu music]]
| groupCat    =dBu music
| released    =2014-12-29
| convention  =Comiket 87
| tracks      =7
| length      =29:39
| catalogno   =DBCD-0019
| website     =[http://www.dobuusagi.com/dBu19th/index.html Link]
| image       =DBCD-0019.jpg
| banner      =DBu bana1.gif
| arranger    ={{どぶウサギ}} ([[dBu music]])
| producer    ={{どぶウサギ}} ([[dBu music]])
| illustrator ={{lang|ja|綾見ちは}} ({{lang|ja|[[疲労熊]]}})
| other_staff =
; Background
: {{lang|ja|云熊まく}} ({{lang|ja|[[疲労熊]]}})
| description =It features instrumental arrangements of tracks from ''[[Ghostly Field Club]]'', ''[[Changeability of Strange Dream]]'', ''[[Retrospective 53 minutes]]'', ''[[Magical Astronomy]]'', ''[[Trojan Green Asteroid]]'' and ''[[Neo-traditionalism of Japan]]''.
| tracklist   =

* {{Track|01|Ghostly Field Club|04:04}}
** arrangement: {{どぶウサギ}}
** original title: {{lang|ja|少女秘封倶楽部}}
** source: {{GFC}}

* {{Track|02|NSE HIROSHIGE36|04:04}}
** arrangement: {{どぶウサギ}}
** original title: {{lang|ja|ヒロシゲ36号 ～}} Neo Super-Express
** source: {{R53m}}

* {{Track|03|{{lang|ja|魔術師マエリベリー}}|04:43}}
**''[[Maribel]], the Magician''
** arrangement: {{どぶウサギ}}
** original title: {{lang|ja|魔術師メリー}}
** source: {{GFC}}

* {{Track|04|{{lang|ja|深緑の隔離病棟}}|04:50}}
**''Deep Green Isolation Ward''
** arrangement: {{どぶウサギ}}
** original title: {{lang|ja|緑のサナトリウム}}
** source: {{NtoJ}}

* {{Track|05|Artificial Satellite TORIFUNE|04:35}}
** arrangement: {{どぶウサギ}}
** original title: {{lang|ja|衛星トリフネ}}
** source: {{TGA}}

* {{Track|06|G Free -Off Limitter Remix-|03:54}}
** arrangement: {{どぶウサギ}}
** original title: G Free
** source: {{MA}}

* {{Track|07|{{lang|ja|科学世紀の少女と少女}}|03:29}}
**''Girl and Girl of the Age of Science''
** arrangement: {{どぶウサギ}}
** original title: {{lang|ja|科学世紀の少年少女}}
** source: {{CoSD}}
}}