It's a wonderful world. [English]

Song: It's a wonderful world.
Composer: HAMO
Lyricist: HAMO
Vocalist: 初音ミク (Hatsune Miku – Append)
Nico: sm14232909
Youtube: watch?v=a2TbhUVO51w

おたまじゃくしとアンブレラ (Musical Note and Umbrella)

Song: おたまじゃくしとアンブレラ (Musical Note and Umbrella)
Composer: take_coke
Lyricist: take_coke
Vocalist: 初音ミク (Hatsune Miku)
Nico: sm11286694
Youtube: watch?v=xEnAOGCSnJY

ユラメク(Flickering) [English]

Song: ユラメク(Flickering)
Composer: ヘブンズP (Heavenz P)
Lyricist: ヘブンズP (Heavenz P)
Vocalist: 初音ミク(Hatsune Miku)
Nico: sm5807851
Youtube: watch?v=Upygl71yKJc&

卒業写真 (Graduation Photo) [English]

Song: 卒業写真 (Graduation Photo)
Composer: 荒井由美 (Arai Yumi)
Lyricist: 荒井由美 (Arai Yumi)
Vocalist: 鏡音レン(Kagamine Len - Append SERIOUS)
Youtube: watch?v=1WDNE6d6U-E
This song is original sung by Arai Yumi. This is only a short version used for Len's append demo song.

eye glasses [English]

Song: eye glasses
Composer: ルシュカ (Lushka)
Lyricist: ルシュカ (Lushka)
Vocalist: ルシュカ (Lushka)
Youtube: watch?v=Tnl5509_D4g
From the album Lunetia.

サディスティック・ラブ (Sadistic Love) [English]

Song: サディスティック・ラブ (Sadistic Love)
Composer: Junky
Lyricist: Junky
Vocalist: 鏡音リン (Kagamine Rin)
Nico: sm13292326
Youtube: watch?v=S8tqaVizvOU

[Background Story Trans] Return to Zero [Project "0"]

Translation of the background information on the "Return to Zero" series.
Original text found on the offfical website: Return to zero [Project "0"]

Disclaimer: Project "0" is Kuuya and Suzunaru Ichigo's collaborative work.
This was translated without permission, and is for enjoyment purposes only.
Accuracy in translation is not confirmed.