星屑ユートピア (Hoshikuzu Utopia)

Background
This song was uploaded to Niconico on January 30, 2009. It is one of otetsu's most popular songs, with over 1 million views on Niconico Video.

It is featured on the albums EXIT TUNES PRESENTS Vocalolegend, EXIT TUNES PRESENTS Megurhythm feat. 巡音ルカ, Hatsune Miku -Project DIVA- extend Complete Collection, and EXIT TUNES PRESENTS THE BEST OF Otetsu.

Concerts
This song was featured in the Miku no Hi Kanshasai 39's Giving Day concert.

Sheet music
Piano sheet music appeared in the Piano Solo Yasashiku Hikeru 2 collection. Additionally, a novel based on the song is planned for release in the near future.

Novel adaptation
A book based on this song was also produced.