They look clearly uncomfortable, specially Ahyoung and Serri. I feel for every female group having to perform in front of an all-male audience... Polite as the audience can be, it always turns into an objectification parade.
Well I guess it's korea's culture. With a culture/society still believing in gender roles(Girls having short hair is 'boyish' or guys need to be 'manly') it's common to objectify women like this. The women in kpop are always judged first and foremost by their appearance and if they don't match the standard of beauty in Korea, they are considered ugly which is dumb AF. But honestly, what can you do right?