そして君は月になった (Soshite Kimi wa Tsuki ni Natta)

Background
Kikuo's 12th VOCALOID song. This song is about two best friends that are represented as the moon and the star. The song seems to be expressing a close friendship that also develops distance gradually. One of the friends dies by freezing to death, failing to be saved by the other friend who tries to warm them up. Unfortunately, the other friend dies as well. The song ends by saying that they both became the moon and star as they disappear into the depths of space.

"Soshite Kimi wa Tsuki ni Natta" is included on the albums EXIT TUNES PRESENTS Supernova 7 and KikuoMiku 2.