Original: The original version of the song uploaded to niconico on March 22, 2008, and to piapro on March 30, 2008.
Remastered version: A revised version of the song featuring new vocals and instrumentals uploaded to piapro on January 11, 2009, and later featured on EVILS THEATER.
Prism version: A version sung by Kagamine Rin's voice provider Asami Shimoda that was released on her album Prism.
Key Of Word: A revised version featuring new vocals, instrumentals, and PV along with additional lyrics uploaded to niconico and YouTube on July 27, 2018, and later featured on Clockwork Lullaby.
The original PV's illustration was drawn by mothy.
As the first song in the Clockwork Lullaby series, it is the first song to feature the complete lulila motif, and is preceded by Wordplay and succeeded by Miniature Garden Girl.
The first two lines of the song mirror the last two lines of Wordplay.
The character featured in the PV appears identical to Kagamine Rin's VOCALOID2 module.
mothy notedtwice that the song "may or may not" be related to Wordplay.
The additional lyrics in Key Of Word reference the title of Miniature Garden Girl.
