I am little monster! 
its definitely one of the best
Not the best but still a bop
Yeah agree one of the best S.M songs 
Bop and I love the choreography as well
from the past 2 years yeah but I think bad boy might be a better song from red velvet
Not close to the best but still a bop. Could be the best, or at least one of the best, from the last 2 years
Bop! I don't think it's the best song though 
I love this song, their whole subunit was so refreshing 
The girls done so well 
STREAM THE NIGHTMARE SULTRY BOP THAT IS MONSTER!
Nope nope nope
but if you like it i love it
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