Mok Hae Won

Mok Hae Won's ordinary life has changed completely after her father's death. Her mother was sentenced to prison for negligent manslaughter of the death of her husband. With her mother in jail, father dead, Hae Won only had her aunt left and she moved with her to Bookhyun Village.
In high school, she and Bo Young, a fellow classmate became best friends. However, things took a turn for the worse when Bo Young shared her secrets with others. Hae Won became branded as the "daughter of a murderer" and lived in hell after that. In order not to get hurt anymore, she built walls of cold bricks around her heart and chose to be alone without letting anyone into her life.
As soon as she graduated from high school, she returned to Seoul for university and found a job at a school as a cello instructor. Later, she becomes sick and tired of her life in Seoul and decides to move back to Bookhyun Village. Back there, Hae Won meets again her former classmate, the warmhearted Eun Seob and her frozen heart begins to melt.

(Source: Soompi, Wikipedia, malaysiankpopfans on Tumblr)