-Noticing how they were being filmed @ 1:45 and telling some of the other members
-Calling out the cameraman
HERE (@ 3:11)
Upskirt fancams are a very common occurence in kpop (even of underage members and regardless of whether the group has a "sexy" concept or not) but this time it was the actual cameraman of the event filming the 9 Muses members from below and the video was projected on the wall behind them. Hyuna noticed how they were being filmed while performing and told the cameraman to cut it out as soon as the song was finished.
9 Muses are arguably under one of the shittiest entertainment companies in South Korea, as evidenced by their documentary
"9 Muses of Star Empire", where you can see the group generally being mistreated (
choice examples: slapping a member, treating them like objects). The leader of ZE:A, a boygroup under the same company, has also spoken about the various abuses they've suffered (
1,
2,
3) before unsurprisingly dropping the matter. Basically pray this doesn't get her in trouble with her company bc the "professional" thing to do would have been to suck it up and say nothing.
source:
1,
2,
3,
4,
5,
6,
7