SISTAR has dropped another image with a "riddle" on it for their summer comeback - except this time, it's pretty illegible.
However, you can distinctly make out the words, "Only you have to disappear." Gives off a psychotic, murder-y thriller vibe, doesn't it? Maybe the girls will return with a more darkly sexy concept like "Alone" rather than their usual bright and cheery one for the summer.
Stay tuned for their fourth mini-album!