In what year was the album “Nijino Oto” released by 藍井エイル?

In what year was the album “Nijino Oto” released by 藍井エイル?: The album “Nijino Oto” was released in 2014 by 藍井エイル, featuring 5 tracks.
What is the most successful song from the album “Nijino Oto” by 藍井エイル?: “虹の音” is the biggest hit from the album “Nijino Oto” by 藍井エイル.

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