It’s got Kim Soo Hyun, one of K-drama’s biggest stars, in the lead, and it’s directed by his half-brother, Lee Sa Rang. Throw in Sully—a bold K-pop idol turned actress—and you’ve got a recipe for buzz.

Sulli’s older brother has once again posted a cryptic post online, raising speculation that it may be directed at actor Kim Soo Hyun amid his ongoing controversies. On March 28th, Choi—Sulli’s brother—shared a short but pointed message to his Instagram: “It’s been six years since I lost her.