On September 6, writers Kim Eun Sook and Kim Eun Ha participated in a panel discussion titled 'The Best Meets the Best, Goblin vs. Signal' at Seoul's KOCCA. During the talk session, Kim Eun Sook was asked, "Was it due to the sweet lines from 'Descendants of the Sun' that the Song-Song couple exists today?"

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In response, she stated, "Shouldn't that be a question for Song Hye Kyo? I'm not really sure, but she did mention something about that once. Yoo Si Jin changed Song Joong Ki."

The writer continued, "Song Joong Ki has always been the cool manly type. I think a drop of sweetness has been added to that. They are both so lovely... They just can't get enough of each other. They're madly in love. I would like to congratulate them again."