His original post did not directly mention Kim Soo Hyun.

On March 22, Sulli’s older brother uploaded a blank post to his personal Instagram with a caption that left netizens speculating that the “Kim” he is referring to is Kim Soo Hyun.

It was unclear who he was referring to, though Kim Soo Hyun’s connection to Sulli led many to believe he was the “Kim” mentioned. In 2017, Sulli and Kim Soo Hyun starred in the movie Real together, directed by Lee Sa Rang. The movie was criticized for not having a clear plot and heavily advertised Sulli’s nude scenes.

It seems Sulli’s brother’s post caught the interest of fans of Kim Soo Hyun, and resulted in him making a new post addressing them.

The new post similarly featured a blank image, but directly mentioned Soo Hyun in the caption.

“How is it that the so-called ‘fans’ are the ones being the least helpful?I didn’t even mention Soo Hyun’s name, and yet people came swarming in instantly…Must be driving you crazy too, not being able to fact-check anything, right?Well, I’ve spent years living with that same uncertainty, trying to convince myself by telling myself over and over again, ‘I guess there was no other choice.’ Somehow, that helps me stay sane. I won’t say anything because I don’t need to add to it. There will be plenty of others giving him a hard time. And even if Idid speak up, it wouldn’t become fact anyway—and it wouldn’t help any of you, either. So maybe just don’t poke the bear and move along. Oh… and by the way, aren’t you the ones constantly dragging my sister onto the chopping block over similar issues? The way her name keeps getting brought up all over the place—it’s honestly disgusting.”— Sulli’s Brother

This post also does not outright deny if Kim Soo Hyun was the intended target, and has only caused further speculation.