On March 9, the contestants on the idol survival program unveiled their mystery with a special stage with "Pick Me" on 'M Countdown'. A total of 101 trainees showed up for the recording and made a public appearance for the first time. 

SEE ALSO: Male trainees auditioning for 'Produce 101' have their very first special stage on 'M Countdown'

Fans didn't miss this golden chance and managed to capture various photos of the trainees. 

Check them out below!