On the August 10 episode of 'Happy Together 3', the members of Girls' Generation made a guest appearance. During the talk, MC Yoo Jae Suk said, "YoonA was a scene stealer in the film 'Cooperation'."
The members responded, "[Of all roles YoonA has played], that character was the most similar to YoonA's actual self."
YoonA, who played a girl with a big crush on Hyun Bin in the film, commented, "Hyun Bin was so handsome so there wasn't much to act. I found myself saying, 'He's so cool'. He did help in my acting."