Big Bang's�Daesung will make his�drama debut through "What's Up", and behind-the-scenes photos of the leading star were recently revealed. Producers of the musical drama were said to have been unable to hold back their praise for the young star, particularly since he had to run around the set in short sleeves despite the freezing weather in order to shoot a summer scene. # "You did well, let's go again!" Song PD gives instructions to Kang Daesung and Im Ju Hwan. # A college student asks Daesung for a picture while the set is on break. # "Let's see who did the best!" Im Ju Hwan shows off footage he took with his cell phone and laughs with his castmates. "When did we get so good?" # Kim Ji Won dances to 2NE1's Park Bom's "You & I" in the freezing cold. The two immediately dash to the nearest fireplace as soon as Song PD shouts "Cut!" # The distance between the camera and the actor is being measured. # As soon as the actors hear "Cut!" they immediately rush to find their jackets. Kang Daesung shouts, "Be careful of colds!" to Kim Jiwon and others. Source + Photos: Sports Korea