In what year was the album “One” released by JunHo (2PM)?

In what year was the album “One” released by JunHo (2PM)?: The album “One” was released in 2015 by JunHo (2PM), featuring 10 tracks.
What is the most successful song from the album “One” by JunHo (2PM)?: “Believe” is the biggest hit from the album “One” by JunHo (2PM).

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