Jeon Jungkook, 22, a member of BTS, is looking for his lost sister.
Kim Young-hoon, 22 years old, sub vocalist of The Boyz
I've been friends with Jungkook for 22 years
Lee Hyun-jae, 22 years old, has been friends with Young-hoon Jeong-guk for 22 years.
The Boyz main vocalist
Jiwoo, 18 years old, has a lost older brother