Time Shi Gan (2006)

Time is the story of Seh-hee and Ji-woo, a young couple two years into their relationship. Though he never acts on his impulses Ji-woo has something of a roving eye and Seh-hee is intensely jealous and fearful that Ji-woo will soon lose interest and leave her. Believing that Ji-woo is bored with seeing the same, boring her all the time Seh-hee takes drastic action, leaving him without warning and having drastic cosmetic surgery, taking on a new face, which she hopes to use to snare him again, under an assumed identity, once she has healed. But when Ji-woo shows interest in this new and "improved" Seh-hee it triggers only more self doubt and loathing. After all, he may love the 'new' girl, but does this mean that he has rejected the old? Seh-hee is utterly trapped in her own insecurities, a situation that prompts Ji-woo to take drastic action of his own.