In what year was the album “Innocent” released by Rainbow (K-pop)?

In what year was the album “Innocent” released by Rainbow (K-pop)?: The album “Innocent” was released in 2015 by Rainbow (K-pop), featuring 6 tracks.
What is the most successful song from the album “Innocent” by Rainbow (K-pop)?: “Bad Man Crying” is the biggest hit from the album “Innocent” by Rainbow (K-pop).

Other artists of K-pop