tvN's 'It's Okay To Not Be Okay' reveals behind-the-scenes video of Kim Soo Hyun and Seo Ye Ji enjoying themselves in a high school uniform. (via Soompi)

 

The footage started with a rehearsal of Kim Soo Hyun and Seo Ye Ji in their "embrace scene." Kim Soo Hyun was instructed by the director and was asked to perform many takes as he runs up the stairs to get the right camera angle.

 

In the next shots, Kim Soo Hyun and Seo Ye Ji wore their uniforms again and revealed their naughty side. While Kim Soo Hyun was sitting with other students, he actively promotes their drama saying, "you have to watch it again and watch it again."

 

The wearing of the school uniforms is for the brief dream scene in which Kim Soo Hyun and Seo Ye Ji imagine themselves as ordinary high school students. Oh Jung Se blocks Kim Soo Hyun as he tries to approach Seo Ye Ji. Oh Jung Se tries to call Seo Ye Ji over, but both he and the director say that it sounds scary.

 

Kim Soo Hyun told Seo Yi Ji that she looks like a model while walking towards him. She then strikes a pose and asks Kim Soo Hyun to imitate her. Oh Jung Se told Kim Soo Hyun that he looked so cute, and instead of leaving, he sat on the nearest bench and watched the two enjoy and laugh.

 

Kim Soo Hyun filled the video with his playful character. In one scene, Kim Soo Hyun shared a meal with Oh Jung Se, and the director expressed that he is glad that he is enjoying his meal and jokingly continued, "but you need to look at your brother once in a while."

 

Moreover, in the scene where Seo Ye Ji is rushing to go outside, Kim Soo Hyun waves at her behind the camera only to inform her that he is still in the frame.