The actor playing role in《Dear X》is“Kim Yoo Jung”

She suffers from antisocial personality and was abused by her biological parents and Junshu's mother since she was a child.With her outstanding appearance and excellent grades, she has won the envy of people around her. She also knows how to hide this personality, so she has never revealed her secrets in front of outsiders. The only person who can let her reveal her true emotions is Kim Jae-oh, who grew up in a similar environment.