Letter song

Background
Wondering where her life will take her, Miku leaves behind reminder questions for the "her 10 years into the future" to answer and see if she's changed and satisfied with her life.

This song has entered the Hall of Fame.

This song is featured in the album unformed and is the 12th track of the album.

Other media appearances
This song was performed at the Hatsune Miku Live Party 2013 (MikuPa)/Kansai concert.