DESCRIPTION:
Araki (あらき) is an amazing utaite and you can find his channel here:- http://www.nicovideo.jp/watch/sm25103020

Echo was originally born from CIRCRUSH, a collaboration of Crusher-P and Circus-P, their channels are:-

https://www.youtube.com/channel/UCS1RUyEDJ3TSiil8TC84G4g
https://www.youtube.com/user/VocaCircus






Original MMD from Nico Nico here - http://www.nicovideo.jp/watch/sm26208032