The secret of the appearance in "WANNA ONE" and "MAMA" is Hot Topic. ..

● When leaving the last concert of the activity

Lai Kuan Lin → Hwang Min Hyun → ONG SUNG WOO → Pak Wu Jin → Park Ji Hoon → KIM JAE HWAN → Lee Dae Hwi → Ha Seong Woon → Bae Jin Yeong → Yun Ji Seong → Kang Daniel

● In MAMA, the opposite is true.

Kang Daniel → Yun Ji Seong → Bae Jin Yeong → Ha Seong Woon → Lee Dae Hwi → KIM JAE HWAN → Park Ji Hoon → Park Wu Jin → ONG SUNG WOO → Hwang Min Hyun and Lai Kuan Lin.