On October 12th, Polaris Entertainmentrevealed the third member of TRIPLEME would be Choi Jae-Won. He will be joined along with Choi Si-Hun and Park Chan-Kyu. 

Based on the group name it would be safe to assume that this will be the lineup for Tripleme, although no announcement has been made that this is the final lineup.

Check out his concept video below!