Wonder Boyz, the new idol stars trained under the management of DJ DOC’s Kim Chang Ryul, is finally making its first step onto the music scene by kicking off their debut “Open The Door” performance on this week’s ‘M! Countdown’.

The group consists of members Master One, K, BakChiGi and Young Boy and have been prepping up for musical debut under the guidance of ENT 102. They made their first public appearance through SBS MTV’s reality variety show “Ta-Dah! It’s Wonder Boyz”.

Regarding to its name, Kim Chang Ryul stated, “DJ DOC’s other member Lee Haneul named the group Wonder Boyz. Sensing the witty and cheerful personalities of the young members, the group name instantly popped up in his mind.”

Check out their performance below.