{{MusicArticle
| titlejp     = 忘我の境
| titlejprom  = bouga no sakai
| titleen     = The Border of Esctasy
| group       = {{天狗ノ舞|link}}
| groupCat    = {{天狗ノ舞|en}}
| released    = 2011-12-30
| convention  = Comiket 81
| tracks      = 7
| length      = 25:32
| catalogno   = TNRE-0005
| genre       = {{Genre|Rock}}, {{Genre|Vocal}}
| website     = [http://natsume.ushimairi.com/1230_bouga.html Link]
| image       = TNRE-0005.jpg
| banner      =
| caption     = Pictured: [[Yuyuko Saigyouji]]
| producer    = 
| illustrator = 
| designer    = 
| masterer    = 
| other_staff = ;Arrangement
:{{玖}} ([[天狗ノ舞]])
:{{湯豆腐}} ([[Kurage seek room]])
;Vocals
:{{電気}}
:{{玖}}
:{{赤樫はがね}} ([http://redoakshadow.blog103.fc2.com/ Bloody Edge])
;Lyrics
:{{玖}}
;Illustration
:{{赤樫はがね}} ([http://redoakshadow.blog103.fc2.com/ Bloody Edge])
;Keyboard
:{{湯豆腐}} ([[Kurage seek room]])
| description = 
| autogendesc = vocal and instrumental
| tracklist   = 

*{{Track|01|{{lang|ja|果てしなく虚ろな心}}|01:46}}
**''Infinitely Empty Heart''
**arrangement: {{玖}}
**original title: {{lang|ja|アルティメットトゥルース}}
**source: {{PCB}}

*{{Track|02|{{lang|ja|残響}}|02:38|lyrics=Lyrics: 残響}}
**''Echo''
**arrangement: {{玖}}
**lyrics: {{玖}}
**vocals: {{玖}}
**original title: {{lang|ja|アルティメットトゥルース}}
**source: {{PCB}}

*{{Track|03|{{lang|ja|さ迷える魂、少女の夢、あの透明感の中で}}|10:12|lyrics=Lyrics: さ迷える魂、少女の夢、あの透明感の中で}}
**''A Wandering Soul, Girl's Dream, Inside a Feeling of Transparency''
**arrangement: {{玖}}
**lyrics: {{玖}}
**vocals: {{赤樫はがね}}
**original title: {{lang|ja|幽雅に咲かせ、墨染の桜　～}} Border of Life
**source: {{PCB}}

*{{Track|04|{{lang|ja|眩惑}}|01:58}}
**''Dazzling''
**arrangement: {{玖}}
**lyrics: {{玖}}
**vocals: {{玖}}
**original title: {{lang|ja|アルティメットトゥルース}}
**source: {{PCB}}

*{{Track|05|{{lang|ja|余命／自尽}}|01:41}}
**''Remaining Days / Suicide''
**arrangement: {{玖}}
**original title: {{lang|ja|アルティメットトゥルース}}
**source: {{PCB}}

*{{Track|06|{{lang|ja|平穏と追憶}}|02:12}}
**''Peace and Reminiscence''
**arrangement: {{湯豆腐}}
**original title: {{lang|ja|アルティメットトゥルース}}
**source: {{PCB}}

*{{Track|07|{{lang|ja|死してなお、愉しく死ぬ}}|05:05|lyrics=Lyrics: 死してなお、愉しく死ぬ}}
**''Die at Last, Rejoice in Your Death''
**arrangement: {{玖}}
**lyrics: {{玖}}
**vocals: {{電気}}
**original title: {{lang|ja|さくらさくら　～}} Japanize Dream...
**source: {{PCB}}

}}