夢みることり (Yumemiru Kotori)

夢みることり (Yumemiru Kotori / Dreaming Little Bird) is a folk song composed and illustrated by Hayaya-P, and sung by Hatsune Miku and Kagamine Rin.

The song has yet to reach 1 million views; however it's considered to be one of the most popular Vocaloid duets and has been covered by various Vocaloid combinations, also human covers and arrangements by other authors.
 * Nicovideo Broadcast
 * YouTube Broadcast (Subbed)

Background
Achieving over 890,000 views, this song is one of the most complicated duet songs to sing. For it requires at least two people, different lyrics and melody, which makes the song more unique. The single album "Yumemiru Kotori" was released in KarenT to celebrate the Kagamine Rin/Len Append's first anniversary. Also, on June 2009, the song is available in JOYSOUND, and featured in an EXIT TUNES compilation, Vocalostar.

The lyrics of the song uses a number of metaphors, meaning many interpretations. It can be interpreted that two friends or lovers try and face a problem / catastrophe that had changed them greatly, reminded of the wonderful past they had before. In short, it's a song of desperate hope, love and freedom symbolized by two birds in a cage.