In what year was the album “Top Secret” released by UP10TION?

In what year was the album “Top Secret” released by UP10TION?: The album “Top Secret” was released in 2015 by UP10TION, featuring 5 tracks.
What is the most successful song from the album “Top Secret” by UP10TION?: “So, Dangerous” is the biggest hit from the album “Top Secret” by UP10TION.

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