にじいろのはる (Niziiro no Haru)

Background
"Rainbow Colored Spring" is an original song by Fuwari-P and is his 16th work. It's also Fuwari-P's first work with IA.

This song is featured in the albums Vocalosensation, FuwariP da yo☆ ~Yume no Katachi~, and Vocaloseasons ～Spring～.