On April 18, a representative in KBS‘s drama department told Daily Sports, “Seo In Guk, Jang Nara, Lee Chun Hee, Choi Won Young, Do Kyungsoo (D.O) and Park Bo Gum will appear on KBS’s new Monday-Tuesday drama ‘Hello Monster.’ We will have the first script reading next week.”

Seo In Guk will be playing the role of a criminal profiler who majored in criminal psychology. His character works as a crime investigation consultant in New York before flying back to Korea to join the Special Crime Investigation team. He is skilled in analyzing crime scenes and profiling a person with just a single look. He’s a very charming yet lonely and dangerous person, and does not care what others think of him.

Jang Nara’s character is in charge of the Central Police Force’s Special Investigation team. Her fancy appearance does not quite match the career she has chosen, which adds to the mysterious fact that she joined the force with a specific goal in mind — having something to do with a confidential document.

Lee Chun Hee plays the leader of the Special Crimes team. He gets appointed as the leader after working as a resident officer overseas. He was a model student who grew up in a good environment with a good education and tends to have high self-esteem.

Actor Choi Won Young will be acting as a scientist of a company overseas, who specializes in managing various chemicals and machinery in all of forensics teams’ laboratories in Korea. He is in a position where he is able to see all ongoing crime investigations and has access to exclusive evidences thanks to his connections to the police. He is very unique because he doesn’t seem to have any family or friends.

D.O is not one of the permanent cast members; he will only make special appearances during the first and second episode of the drama. He will play someone who is lost in the main character’s memories. D.O will lead the drama till the second episode before Seo In Guk takes over.

“Hello Monster” is a romantic thriller about a mystery solving duo who bicker and fight but end up developing feelings for each other.

Source (1)

See also:

Seo In Guk in Talks to Join “Hello Monster” Opposite Jang Nara

Park Bo Gum and EXO’s D.O in Talks to Join “Hello Monster” with Jang Nara