Not a korean drama but Choi Ji-woo stars in this 11-part
Japanese drama alongside delicious Japanese actor, Takenouchi
Yukata, so it warrants an entry in our forum 
There're two other
korean actors in this drama too. Look out for established star,
Shin Hyun-joon, and Lee Jung-hyun.
The drama is now showing on Ch.56 at 11pm on Mondays & Tuesdays
... I missed the first two eps 
Synopsis:
Japan and Koreas biggest names star in this big-scale drama.
Yutaka Takenouchi portrays Sho Nishijima, a Japanese detective
whose father was murdered in Korea when he was still a boy. In
hopes of discovering the truth behind his fathers death, Sho is
working undercover in a huge secret organization. Choi Ji Woo
portrays Choi Yuna, a Korean woman who visits Japan in search of
her missing father. She opens a Korean restaurant with her younger
sister, but soon faces the mercy of fate. The couple meets in a
corner of Tokyo and fall in love. But what waits ahead of them
A
rondo of fate, love, and history is about to begin.
Cast:
Takenouchi Yutaka as Nishijima
Sho/Kanayama Takumi
Choi Ji Woo as Choi Yoon A
Shin Hyun Joon as Kim Young Jae
Takenouchi Yutaka is really hot ... 