Hengbok Happiness (2007) - Jin-ho Hur

A love story about two people who meet while battling serious illnesses. Abandoned by his friends and colleagues after his fast-lane lifestyle leads to cirrhosis of the liver, a reckless young business owner retreats to a countryside sanatorium.

Plot:
Young-su (Hwang Jung-min) is constantly out drinking and clubbing until the small hours of the morning. When Young-su falls ill as a result of his constant hard partying, the hastiness with which his many friends and lovers depart from his life quickly makes him realize just how shallow his relationships have become. Upon arriving at the countryside sanatorium for his convalescence, the ailing businessman begins to develop feelings for pretty fellow patient Eun-hee (Lim Soo-jung). Recently diagnosed with a critical lung disease, Eun-hee views every day above ground as a gift and never lets her inner agony rise to the surface. Eun-lee struggles to maintain her health by sticking to a strict daily regiment of open-air exercise and chores while existing on a healthful diet. At first Young-su flirts playfully with Eun-hee strictly out of habit, but eventually something unusual happens. As Young-su and Eun-hee gradually get to know one another, the ailing playboy realizes that his attraction to the eternally optimistic Eun-hee has grown beyond the physical into something much more substantial.