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-producer Mafumafu.

This song has entered the Hall of Fame