Iris
아이리스 (original)
Two friends' lives are changed forever when they are recruited by a top-secret organization tasked with protecting the country from foreign threats.
Starring Kim Yeong-cheol, Im Soo-hyang, Lee Joon, Yoon Soy, David Lee McInnis, Kim Seung-woo, Lee Bo-hee, Jang Hyuk, Yoon Joo-sang, Oh Yeon-soo
Watch "Iris" on Netflix released in 2009. It's a drama and action & adventure show, and has a rating of 7.7 out of 10 from Imdb which is usually fine for this kind of show.