Kim Chong Ki is a 35 year old doctor in Gongdeok-dong who has long communicated with the public by conducting counseling and writing columns through online media such as newspapers and YouTube videos related to mental health.
He wrote his own book called "I Don’t Know What’s Wrong With Me" and released it 29th of January 2019. As mentioned in the book, patients are taught how to take care of their own mental health through mental health examinations. Kim Chong Ki has passed the Hanyang University Medical School’s early admission after winning the grand prize. He has also won "The Best Prize In The Natural World" at the 2007 Saenggeol Essay Contest, the largest essay contest for high school students. Kim Chong Ki, who completed the Department of Psychiatry at Hanyang University Hospital after completing his master’s degree in medicine, is a full member of the Korean Neuropsychiatric Association and is in charge of the management and editing of the psychiatric newspaper.
(Source: 3rdCave, Translated by IU_baby at MyDramaList)