Entirely fair, I was uncertain in the first place. Do you know it is? I'll almost certainly upload more of this copyright in the future, so it'd help.
@schule it seems to me to not be a very historically accurate costume. I think adding korean clothes should be good enough. I think it looks the most like the chinese zhijupao, but if its supposed to be set in Korea, it's probably not supposed to be hanfu- although korean traditional clothes are pretty directly descended from hanfu.
