My 1st time hearing P1HARMONY! Reacting to "Siren, Back Down, JUMP & Killin' It" MVs!

#p1harmony #killinit #피원하모니

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0:00 INTRO
1:48 KPOP PROFILE
7:43 SIREN
13:00 BACK DOWN
20:00 JUMP
24:35 KILLIN' IT