Lee Rubin is finally going to make his debut!

The 'Mix Nine' contestant, who finished the survival series in third place, is among the five Liveworks Company trainees set to debut as part of boy group 1TEAM.

On March 4, 1TEAM's agency released a special 'prologue film' revealing all five members to the public for the first time. In the clip, the boys are throwing a house party and having plenty of fun goofing off together when suddenly the doorbell rings. While no upcoming music from the group is revealed, the film highlights each member's individual charm and unique visuals.

Meanwhile, 1TEAM is set to make their debut on March 27!

Check out the prologue film above!