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Before airing the BTS episode of 'Knowing Brothers', Heechul posted a selfie with himself and Suga. The caption reads, "My little brother Suga whom I met through 'Weekly Idol', it's already been 2 years since then...time goes by really fast. Before filming the first episode of 'Weekly Idol', I was told BTS would be appearing so I decided to look them up and while doing so, I became a fan ('Dope' MV was really dope and 'I NEED U' smashed my sensitivity). Also, I heard Suga and Heechul's chemistry was unreal today. You can check out the chemistry today through 'Knowing Brothers'."

Don't miss out on the two artists' chemistry on 'Knowing Brothers'!

<주간 아이돌>이 맺어준 동생 슈가 슈가 민윤기벌써 2년 전.... 시간 참 빠르다 <주간 아이돌> 첫 녹화 때 '방탄소년단' 친구들이 나온다길래 이름이랑 노래 좀 알고 가려고 온갖 영상들을 다 찾아보다가 팬이 되었다(쩔어 뮤비 진짜 쩔어. 내 감성 후드려패는 I NEED U 짱짱곡)그리고 녹화 하면서 슈가철 캐미가 터졌다고 합니다방송으로는 아무도 확인할 수 없었지만그 궁금한 캐미!! 바로 오늘 JTBC <아는 형님>에서 확인하실 수 있습니다☺☺ #역토아 #역시토요일은아는형님 #아는형님 #방탄소년단 #슈가 #DNA

A post shared by Kim Hee Chul (@kimheenim) on Sep 22, 2017 at 7:58pm PDT