This weekend, SEKAI NO OWARI will headline South Korea’s Valley Rock Festival. The festival is hosted by TV station Mnet and is in cooperation with Japan’s Fuji Rock Festival. Ahead of the festival, SEKAI NO OWARI took some time to promote in Korea. The band performed their hit song “ANTI-HERO” on Mnet’s music show, M COUNTDOWN. They also performed on a radio show on the station MBC. Check out the performances after the jump!