[ Vani lla] - wish -koufuku no mitsudo- (wish -幸福の密度-)
05:41
Utata-P Hatsune Miku - This is the Happiness and Peace of Mind Committee (Kochira, Koufuku Anshin Iinkaidesu)
03:33
あんく (un:c Anku) Utata-P - Kochira, Koufuku Anshin Iinkai Desu.
04:36
鬱P (Utsu-P) feat. GUMI - Koufuku Ressha ni Norou, Let's Ride the Happy Train
03:56
鬱P (Utsu-P) feat. GUMI - 幸福列車に乗ろう [Koufuku Ressha ni Norou] (Riding The Happy Train)
03:56
Akari Nanawo - Bakemono wa koufuku o nozonda
03:35
Aho no Sakata - Ayano no Koufuku Riron
05:46
Aho no Sakata - Ayano no Koufuku Riron -Acoustic ver.-
05:45
じん (Jin) & うぃんぐ (Wing) feat. ゆめこ (Yumeko) - アヤノの幸福理論 Ayano no Koufuku Riron (piano ver.)
05:49
お月さま交響曲 (Otsuki-sama Koukyoukyoku) (Moon Symphony) - IFの幸福理論 IF no Koufuku Riron
06:52
きくお feat. 初音ミク - A Happy Death - Again - (幸福な死を Livemix, Koufuku na Shi wo Livemix, A Happy Death Livemix)
17:10
きくお feat. 初音ミク - A Happy Death - Again - (幸福な死を Livemix, Koufuku na Shi wo Livemix, A Happy Death Livemix)
06:48
[Suite Precure p.1] Yasuharu Takanashi - 32. Koufuku no Melody Instrumental
03:05
Rina Satou, Asuka Ogame - Egao ni Naru (without Ryo) ED Ending Эндинг ( Koufuku Graffiti OST )
04:08
Rina Satou, Asuka Ogame - Shiawase Graffiti (without Ryo)( Koufuku Graffiti OST )
04:20
Rina Satou, Asuka Ogame - Gohan no Renshuu ( Koufuku Graffiti OST )
03:06
Rina Satou, Asuka Ogame - Gohan no Renshuu (without Ryo) ( Koufuku Graffiti OST )
03:06
Rina Satou, Asuka Ogame - Gohan no Renshuu (without Kirin) ( Koufuku Graffiti OST )
03:01
Rina Satou, Asuka Ogame - Egao ni Naru (without Kirin) ED Ending Эндинг ( Koufuku Graffiti OST )
04:08
UtsuP feat. GUMI - Koufuku Ressha ni Norou
03:59
Hanbun no Tsuki ga Noboru Sora - Noboko - Aoi Koufuku
04:07
Hanbun no Tsuki ga Noboru Sora (Nobuko) - Aoi Koufuku
04:07
Hanbun no Tsuki ga Noboru Sora Nobuko - Aoi Koufuku (OP)
04:07
Aoi Koufuku - nobuko
04:07
鬱P (Utsu-P)攀 - Koufuku Ressha ni Norou
03:56
Touma (トーマ) - Mahou shoujo koufuku-ron 魔法少女幸福論
03:15