They're angry over a political scandal that threatens to end the rule of South Korea's president Park Geun-hye. Ms Park is accused of abusing her power by colluding with close friend Choi Soon-sil who is facing fraud charges.
http://www.news.com.au/finance/work/leaders/inside-the-bizarre-scandal-haunting-south-koreas-leader-park-geunhye/news-story/e61d66120fefa7fb9b61961b8f6c9143
SEOUL The heads of nine of South Korea's top conglomerates controlling revenue equivalent to half the country's economy face an unprecedented televised grilling by lawmakers on Tuesday, as the glare from a widening political scandal falls on Korea
That's like from last month http://askakorean.blogspot.bg/2016/10/the-irrational-downfall-of-park-geun-hye.html