민경훈(Min Kyung Hoon)X김희철(Kim Hee Chul)의 3옥타브 고음! 악쓰는 막내라인, 칭↗찬↗해↗ 아는 형님(Knowing bros) 71회

The brother-recorded for 'knowing brothers' theme
"God of music" Lee Sang-min also recognized tremendous treble
"The youngest line" Min Kyung Hoon x Kim Heechul "If three octave is tiring/hard, look ↗ at us!!"
(Feat. Heechul mochang relay)

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