Gong Yoo might be the lecturer of NG maker Suzy but is also the admonished little sister lover.

On June 28th, on the KBS2TV 'Big' official website the production staff uploaded clips with the caption 'The dumpling acting's of the leader of stubbornness and the king leader of stubbornness.'

In the revealed clip Gong and Suzy are at a play ground sharing dumplings with one another. In the clip Gong Yoo blows into Suzy's eye because a dust goes in it and rubs her head and Suzy suspects Gong Yoo's "true" feelings towards her.

In the making of the film, due to the hot weather, Suzy constantly made errors in her lines. Unable to get back into the flow of handling her lines, she started to laugh whenever she saw Gong Yoo's face. Gong Yoo then stated "You have to practice not laughing while acting Suzy," soothing Suzy like a big brother.

Gong Yoo's big brother ways showed itself again when he saw that Suzy's false lashes were falling, and then he stated "Suzy, your lashes fell." and carefully collected them and handed them to her.

Throughout the production the two have been acting brother sisterly making the people around them feel the warmth of their relationship.