It's the start of Knowing Bros.

This is the first episode so don't expect it to be like the later episodes. In this episode, they introduce the MC of the show Kang Ho Dong, Lee Soo Geun, Seo Jang Hoon, Kim Young Chul, Kim Hee Chul, Kim Se Hwang, Hwang Chi Yeul. You may not know the last two names. Kim Se Hwang stays until ep 7 and doesn't come back on Knowing Bros till this day and Hwang Chi Yeul leaves ep 6 but come back on a few times. Lastly, Min Kyung Hoon was not in episode 1 because of his schedule but comes in during ep 2.