Sulli’s brother recently shared a cryptic post on social media, leading many to believe he was subtly referring to his late sister’s former co-star, Kim Soo Hyun. The actor has been under the spotlight lately due to his alleged dating controversy with  Bloodhounds star Kim Sae Ron. In his earlier post, Sulli’s brother wrote, “Kim-ssi, I have a lot to say, but I can’t. You’re going to fall from your high position, so you better hold on tight.” While he didn’t mention any names, many were quick to assume he was hinting at Kim Soo Hyun, who starred alongside Sulli in the 2017 film Real. The Queen of Tears star is currently facing heavy criticism following accusations of dating a minor. Also read: Kim Soo Hyun reportedly hires paid users to flood positive posts amid Kim Sae Ron death fallout, hires 3 crisis management firms Story continues below this ad Sulli’s brother calls out Kim Soo Hyun’s fans in scathing post After his first post got attention, Sulli’s brother followed up with another message. He …