Door to the Night (2013)

Jong-sup who has been raising his only son by himself after his wife died, also loses his son to an unfortunate accident. Then he finds out he's got cancer and only has 6 months to live. Jong-sup doesn't want to lose his dignity until the moment he dies so he hires a caregiver who is Yeon-hwa. Seeing her carry out all of his picky demands, Jong-sup feels attracted to her and it grows big enough to wake up the desire inside him. However, despite Jong-sup, Yeon-hwa weakens him further by being more and more charming with every moment. Just when Jong-sup decides he can't take it any more, he faces an unbelievable truth.