The press conference for upcoming SBS drama 'Three Days' took place at Imperial Palace in Nonhyundong on February 26.  The drama centers on an urgent search for the president who goes missing after three shots are heard.  On this day, actresses Park Ha Sun and So Yi Hyun spoke up about why they decided to take on their roles and how they prepared for it.  

Park Ha Sun said, "Truthfully, people think of me as weak.  The image that people see is not strong.  I wanted to show my strength.  I want to show a different self through the character Yoon Bo Won, one girl among the existing characters as well as an easygoing and warm-hearted police constable who works in the countryside."

So Yi Hyun said, "The script was good and I was happy to get to work with good seniors."

SEE ALSO: Actress Kim So Eun writes heartfelt message after death of former 'We Got Married' co-star Song Jae Rim

The two also talked about going to action school.  Park Ha Sun said that she did not know whether she would be doing any action scenes, but she wanted to try it and attended action school 6 hours a day for a total of 60 hours.  As a result, she lost a lot of weight, which, in turn, lessened her stamina, but she tried to improve this by walking up stairs whenever she had the chance.

So Yi Hyun said, "From a while back, I had a lot of roles for which I needed to go to action school.  Even for this time, seeing as how I'm a guard, I diligently prepared.  I am doing my best so I can keep up with the other people acting as guards."

The first episode airs on March 5!