"Dear"
Uploaded March 14, 2010, with 1,265,300+ views
Produced by 19's Sound Factory
This song is featured in the Miku FES'09 (Natsu) concert, and the Miku no Hi Kanshasai 39's Giving Day concert. This song also featured in the book Vocalo☆Band Score.
(Taken from Vocaloid Wiki)
If you want to listen to it, here's the download link.
Mediafire
