While You Were Sleeping

While You Were Sleeping is a 2011 South Korean television series starring Lee Chang-hoon, Choi Won-young, Oh Yoon-ah and Lee Young-eun. The daily drama aired on SBS on Mondays to Fridays at 19:15 from May 16 to November 9, 2011 for 120 episodes. Plot Oh Shin-young (Lee Young-eun) is a hospital cafeteria nutritionist with a bright personality, who is happily married to Yoon Min-joon (Choi Won-young), who works in the sales department of a food company. But while giving birth, Shin-young falls into a vegetative state induced by the hospital's chief obstetrician Go Hyun-sung (Oh Yoon-ah). Hyun-sung is Min-joon's ex-girlfriend who is still in love with him, despite being married to Chae Hyuk-jin (Lee Chang-hoon), the director of a food company and Min-joon's boss. When Hyuk-jin learns of his wife's betrayal, he plans his revenge. Cast Main characters Lee Chang-hoon as Chae Hyuk-jin Choi Won-young as Yoon Min-joon Oh Yoon-ah as Go Hyun-sung Lee Young-eun as Oh Shin-young Hyuk-jin's family Jung Dong-hwan as Chae Dae-pil Park Joon-geum as Mrs. Jang Baek Min-hyun as Chae Woo-jin Kim Jin-woo as Chae Hwan-hee