Clockwork Lullaby (song)

"This singing voice is a clockwork lullaby."

Clockwork Lullaby, otherwise known as Spring-worked Lullaby, is the first song in the Clockwork Lullaby series. Being the first song of the series, this song set the distinctive Lu Li La found in the succeding songs.

Plot
The mysterious singer in the song, after obtaining the "key called words," begins to tie them into a song: a lullaby she wanted others to listen to, with a distinctive "Lu Li La" pattern.

Although the singer questioned the wishes and desires of the humankind, she declared that she will continue singing, saying that maybe it will heal the heart as the memories and traumas will continue melting and blending with the song.

Singing Roles
Rin Kagamine as ???

Wordplay (EC ???)
Wordplay is the implied prequel of Clockwork Lullaby. In this song, the singer (which seems to be the same one in both songs) learns what are the "words" and begins to play with them as learns the meaning behind them.

This song sets the concept of the "words" mentioned in Clockwork Lullaby, and which the last one expands as "songs". Deepening further the bound between both songs, the last line of Wordplay is the same one of Clockwork Lullaby, and eventually Mothy gave to this song the Official English Name of "Clockwork Lullaby 0".

Re_birthday (EC ???)
Re_birthday makes some direct references to Clockwork Lullaby. Irregular, while trapped in some sort of limbo, hears the distinctive "Lu Li La" pattern used in this song. This lullaby slowly begins to heal his heart and after realize the true meaning behind it, he began to add words to the song. Both are direct references to Wordplay and Clockwork Lullaby.

Deeping the link between both songs, Clockwork Lullaby and Re_birthday share similar images in their original videos.