Knowing Brother is one of the South Korean reality shows that gathers top idol stars such as Kang Ho Dong, Lee Sang Min, Kim Yeong Chul, Lee Soo Geun, Kim Hee Chul, Seo Jang Hoon, and Min Kyung Hoon.
The program is built in the format of a school model talk show. In each episode, the guests will act as new transfer students and will answer questions sent from viewers in turn. The show is funny and playful, making the audience laugh. Guests coming to the show are famous singers, actors, and idol groups, who are comfortable expressing themselves, very friendly, this also has helped idols get closer to the audience.