The stills preview shows Go Ha Neul (Seo Hyun Jin) as a newbie teacher who enters the prestigious private high school. She is excited to start working but encounters the difficulty of preparations for the entrance exam in college. She has to overcome more challenges in the future.
Ra Mi Ran plays the role of a goal-driven and beautiful head of the career counseling department. She is known as the "entrance exam master" of the school. She is always smiling but she is a very vigilant person. Go Ha Neul and Park Sung Soon is not looking at each other in a friendly way.
The preview showed that Park Sung Soon and Go Ha Neul had given off a chilling vibe that made the viewers curious about their relationship with each other. Go Ha Neul looks worried while waiting for Park Sung Soon to speak. Are they friends or enemies?
Seo Hyun Jin and Ra Mi Ran talked about their experience in filming together. Seo Hyun Jin said that they have good chemistry. She said that Ra Mi Ran had very strong energy and makes the people around her laugh. Not everyone is excited to go to work but seeing her makes other people happy. No one knows but she always observes people around her. One positive comment helps her to improve her acting. She said that this is what experience is about. She is open to the advice of other people to improve her acting skills.
Seo Hyun Jin revealed that she sings whenever she is on set and it is very beautiful. She does this to forget about stress and how tired she feels. This makes her feel relaxed. Ra Mi Ran said that she had fun while working with Seo Hyun Jin. She said that she feels excited going on set. They are enjoying their time will filming with great actors. They are getting to know each other more and feel as if they are a big family.
A short trailer of Go Ha Neul's past was also released by "Black Dog." She is involved in a bus accident in a tunnel. Go Ha Neul asked what the reason he did it to her is. She is crying inside an empty classroom.
"Black Dog" will premier on the 16th of December at 9:30 PM KST. It will replace "Catch the Ghost."
