嘘つき魔女と灰色の虹 (Usotsuki Majo to Haiiro no Niji)

Background
"Usotsuki Majo to Haiiro no Niji" is the first Vocaloid song of the popular Soraru, also counting with contributions from fellow utaite who also produces Vocaloid songs Mafumafu. It was uploaded to Niconico on November 03 and has been getting a lot of views since then.