Letter song

Background
"letter song" is an original song by doriko.

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. It is featured in the album unformed.

Concerts
This song was featured in the following concerts.


 * MikuPa Live in Sapporo 2013
 * MikuPa Live in Kansai 2013
 * MikuExpo Live in Indonesia 2014
 * SNOW MIKU LIVE! 2018 (Day 2)