So I've realized that this song cannot be found with the lyrics written and I decided to do it myself. This is my first time doing this, so I apologize if there are any mistakes. I don't think that I'll do other lyrics videos like that.

Song is performed by Trident, composed of Mai Fuchigami, Manami Numakura and Hibiku Yamamura, who voices respectively Iona, Takao and Haruna. It was written by fu_mou and arranged by Masato Kouda.

Lyrics translated by Kaze~ here : http://www.animelyrics.com/anime/arpeggio/innocentblue.htm