With less than a week until the premiere of MBC’s newest Wednesday-Thursday drama, “The King 2hearts” unveiled more teaser stills of its two leads, Lee Seung Gi and Ha Ji Won. The stills are from the upcoming third episode and show both Lee Seung Gi and Ha Ji Won armed in their military uniforms and equipment.

The scene was shot last month at Jeju Island and shows the South and North Korean team of soldiers in the midst of a “World Military Officer Championship.” In order to make the scene look as realistic as possible, the crew equipped the cast with the authentic state-of-the-art MILES: Multiple Integrated Laser Engagement System used in the military. While the shoot spanned over eight hours in the cold, Lee Seung Gi and Ha Ji Won maintained their characters’ spirits and showed no signs of fatigue.

“The King 2hearts” takes place in a fictional contemporary South Korea, which is still ruled by monarchy. The story is about an arranged marriage between North Korean Special Forces female operative Kim Hang Ah and South Korea’s Crown Prince Lee Jae Ha. Initially, the two are blinded by their pride and prejudice against each other, but they manage to get past their differences and fall in love.

“The King 2hearts” will premiere on MBC on March 21 at 9:55PM KST.