BLK have dropped their debut MV for "Hero".
BLK (Beyond Limit Key) have been described as an acrobatic boy group. Their debut release is called 'Into BLK Part 1 - I' and "Hero" is their title track. BLK has 6 members D.A, Taebin, Ilkyung, I, Sorim, and Inno.
Check out their debut MV above.