Teacher's Diary

Song, a washed-up wrestler with a broken arm takes a job as a teacher at a rural school on a houseboat and finds himself feeling lonely after he's cut off from such modern conveniences as 24-hour electricity, smartphones and the Internet. His only solace is the diary of his predecessor Ann, who writes of similar feelings. When she returns to her post, she finds the young man has also written in the diary.
(source : mydramalist)