Ko Soo-hyun

Dae-ho, Man-soo and Jae-kyeong gathered for a friend's wedding. The groom says he's buying so they drink their night away at a street stall. However, the groom doesn't show up and the other three talk about their sex fantasies while they wait...

The story takes place in Seoul, 2011. Lee Yoon-sung is a talented MIT-graduate who's working on the international communications team at the Blue House. He encounters dangerous situations while solving a variety of cases, both big and small, for people who need his help, and eventually becomes a "city hunter."