Following the dating rumors about "Gu Family Book" cast members Suzy and Sung Joon, a staff member from the drama posted about it on Twitter the same day the rumor broke out, hinting that there is more than what meets the eye when it comes to these two.

According to the staff member's post, "Yeo Wool = Gon. Is this the birth of a "Gu Family Book" couple? I guess there are not a lot of people who noticed their closeness as I did, but if they're not together, then they're not together. Please don't ask me any questions about it because I don't know anything either."

Along with the post is a picture of the two during the filming.

Sung Joon and Suzy's agencies have both denied these accusations and insisted that the two actors are only close friends. However, netizens continue digging evidence regarding their alleged secret love affair.

Several photos of the two together during filming have been brought up in light of the controversy, and many more are being convinced that they are indeed hiding their relationship.

Neither party has commented on this recent revelation.

Meanwhile, Sung Joon has revealed plans of transferring to the company that manages Hyun Bin and Shin Min Ah.