The Bow
활 (original)
On a fishing boat at sea, a 60-year old man has been raising a girl since she was a child. It is agreed that they will get married on her 17th birthday. They live a quiet and secluded life, renting the boat to day fishermen and practicing strange divination rites. Their life changes when a teenage student comes aboard.
Starring Han Yeo-reum, Seo Ji-seok, Jeon Kuk-hwan, Seong-hwang Jeon, Jo Hyun-wu
Watch "The Bow" on Kanopy released in 2005. It's a drama and romance movie, and has a rating of 7.1 out of 10 from Imdb which is usually fine for this kind of movie.