In what year was the album “I Will” released by FTISLAND?

In what year was the album “I Will” released by FTISLAND?: The album “I Will” was released in 2015 by FTISLAND, featuring 10 tracks.
What is the most successful song from the album “I Will” by FTISLAND?: “Pray” is the biggest hit from the album “I Will” by FTISLAND.

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