Sulli's brother has recently been active on his Instagram account, sharing cryptic messages that seem to be directed at Kim Soo Hyun. In one of his recent posts on March 30, he expressed his frustration, accusing someone—though not explicitly mentioned—of resorting to contacting their mother in an attempt to silence him. The content of the message suggests a strong disapproval of this action.

While the specifics surrounding these posts are not entirely clear, speculation among netizens suggests that Kim Soo Hyun may be the intended recipient of these messages. This speculation stems from an earlier post by Sulli's brother, where he publicly called out Kim Soo Hyun and the movie's director, Lee Sarang, regarding Sulli's involvement in nude scenes in the film 'Real.' He alleged that despite the availability of a body double, Sulli was convinced to perform these scenes herself. Director Lee Robe, a co-founder of Gold Medalist, the agency representing Kim Soo Hyun, was involved in the production of the film.

In another post on Instagram later that day, Sulli's brother took a dig at Kim Soo Hyun's press conference, criticizing the absence of a Q&A session. He expressed his discontent, implying that he believes he could hold a better press conference if given the opportunity to become a celebrity.

The online community, including netizens on Instagram, has responded to these posts by showing support for Sulli's memory and expressing concern for her family during this trying time.