BLK are introducing member Insoo! 

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BLK (Beyond Limit Key) have been described as an acrobatic boy group, and they'll be making their debut with the album 'Into BLK Part 1 - I' and title track "Hero" on November 28. In the teaser image below, Insoo looks sharp-eyed and chic against a red background.

Stay tuned for updates on BLK's debut.