Copyright: happy synthesizer (vocaloid)
Happy Synthesizer (ハッピーシンセサイザ) is a song for Hatsune Miku and GUMI.
NicoNico Broadcast: http://www.nicovideo.jp/watch/sm12825985
Happy Synthesizer (ハッピーシンセサイザ) is a song for Hatsune Miku and GUMI.
NicoNico Broadcast: http://www.nicovideo.jp/watch/sm12825985