Occuring to the author, Append SOLID is the main vocal. Append Soft is used as the chorus.composed by 太一 / Taichi Visit the composer’s other works at http://www.nicovideo.jp/mylist/12617817Nico source: http://www.nicovideo.jp/watch/sm10955891 append SOLIDBeyond the SkyHatsunemikuVOCALOID初音ミク初音ミクAppend向こうの果て太一空の果ての向こうに