Hatsune Miku - Fish of Spring (春のサカナ) by Katou Taiki
Romaji Title: haru no sakana
Music & Words: Katou Taiki / IhenkaniP
Art: Kafuka
Lovely ED used for Voca 279 /UTAUran 221.
Reprinted from Nico Nico Douga: http://www.nicovideo.jp/watch/sm17500662