While You Were Sleeping(2011)

While You Were Sleeping is a South Korean drama that follows Oh Shin-young, a hospital cafeteria nutritionist with an upbeat spirit, who falls into a vegetative state during childbirth—a tragedy orchestrated by the hospital's chief obstetrician, Go Hyun-sung. Hyun-sung harbors secret feelings for Shin-young's husband, Yoon Min-joon, her former boyfriend, despite being married to Chae Hyuk-jin, a powerful food company director and Min-joon's boss. When Hyuk-jin discovers his wife's lingering affection and betrayal, he sets a calculated revenge in motion. The series weaves together themes of obsession, medical ethics, and corporate intrigue as the characters' lives spiral into moral complexity. Caught between love, ambition, and retribution, the narrative explores how one moment of cruelty can unravel multiple lives and expose the darker impulses hidden beneath respectable facades.