We don't have a biography for Mak Moon / Kim Sun Woo yet. Hang in there, or go ahead and contribute one.
Hwarang Guest cast, played by Lee Kwang Soo Episode 1x01: Episode 1 (Dec 19, 2016) Episode 1x02: Episode 2 (Dec 20, 2016) Episode 1x03: Episode 3 (Dec 26, 2016)