BtoB Lee Chang-seop, 'This is not a sound from your hands' (M Countdown)

The pre-rehearsal includes Golden Child, Gugudan, The Man Black, Mighty Mouse, MonstaX (MONSTA X), BtoB (BTOB), Seo In-young, Stray Kids (StrayKids), IZ*ONE, ATIZ, April, MXM (MXM), Wikimiki (WEKM), IMEKI), JBJ95, Chae Yeon, Kwill, TWICE (TWICE), Promis Nine, Hot Shot and Hay Girls attended.

BtoB (BTOB) member Lee Chang-seop poses.