So Ji Sub commented on his character, "My role consisted of a powerful action scene," giving a bright smile. He then added, "I had to act only wearing underwear," and looked down in embarrassment.  

Actor Hwang Jung Min also complimented his co-star for his passionate acting abilities. "He acted out the scenes without using any kind of protective gear."  

Speaking of protection, actress Lee Jung Hyun mentioned about So Ji Sub, "I think it had to do with the fact that he had done so many action sequences in the past, he was like our safety expert on set. When he saw a sharp nail sticking out where one of the female staff was standing, he would call out 'Wait,' and take necessary safety measures."

SEE ALSO: So Ji Sub named first Korea Travel Expo ambassador

Meanwhile, the historical film is set to launch in theaters this July.