BTOB's Changsub joined the crew in Mongolia as the team's maknae for the season's latter half alongside Eric Nam, Juilen Kang, Ryu Seung Bum, and Park Se Young.
For his first day, he followed Lee Chun Hee around while everyone got to work collecting and scavenging, and during his interview, said, "He's very tall. For some reason, I feel like I'll get along well with him. I don't really know why. Hyung-nim, see you in Mongolia~"