{{MusicArticle
| titlejp     =少女のための空想理論
| titlejprom  =shoujo no tame no kuusou riron 
| titleen     =A Fantasy Theory for the Sake of the Girls
| group       =[[pikapika]]
| groupCat    =pikapika
| groupCat2   =
| groupCat3   =
| groupCat4   =
| released    =2018-05-06
| convention  =Reitaisai 15
| tracks      =4
| length      =
| catalogno   =
| genre       =
| website     =[http://chip.main.jp/pikapika/sora/ Link]
| image       =少女のための空想理論.jpg
| caption     ='''Cover Art:''' [[Renko Usami]] & [[Maribel Hearn]]
| banner      =少女のための空想理論_banner.jpg
| banner_res  =x60
| arranger    ={{味付け玉子}} ([[味玉定食|AZITAMATEISHOKU]])
:{{lang|ja|松浦}} ([[MatsuYani]])
:{{つきいち}} ([[Retractable]])
| lyricist    =; Lyrics & Vocals
:{{飛花}}
| vocalist    =
| producer    ={{飛花}}
| illustrator =; Illustration & Design
:{{飛花}}
| designer    =
| masterer    =
| other_staff =

| description =
| autogendesc =vocal

| tracklist   =

*{{Track|01|{{lang|ja|ロマンシング・トラベラー}}||lyrics=ロマンシング・トラベラー}}
**''Romancing Traveler''
**arrangement: {{味付け玉子}} ([[味玉定食|AZITAMATEISHOKU]])
**lyrics: {{飛花}}
**vocals: {{飛花}}
**original title: {{lang|ja|少女秘封倶楽部}}
**source: {{GFC}}

*{{Track|02|{{lang|ja|ひみつの話}}||lyrics=ひみつの話}}
**''A Single Story''
**arrangement: {{味付け玉子}} ([[味玉定食|AZITAMATEISHOKU]])
**lyrics: {{飛花}}
**vocals: {{飛花}}
**original title: {{lang|ja|緑のサナトリウム}}
**source: {{NtoJ}}

*{{Track|03|{{lang|ja|子猫のスープ}}||lyrics=子猫のスープ}}
**''A Kitten Soup''
**arrangement: {{lang|ja|松浦}} ([[MatsuYani]])
**lyrics: {{飛花}}
**vocals: {{飛花}}
**original title: {{lang|ja|シュレディンガーの化猫}}
**source: {{DrLFR}}

*{{Track|04|Old blue||lyrics=Old blue}}
**arrangement: {{つきいち}} ([[Retractable]])
**lyrics: {{飛花}}
**vocals: {{飛花}}
**original title: {{lang|ja|旧世界の冒険酒場}}
**source: {{DBOA}}

| notes       =
| review      =
| print_references =
}}