ah, when i read this article, i remember something like this
Ji Yeon have lot of issue lately, some article show her expressionless face (blank face) during live show, some said she is exhausted with filming, as CF model, tight schedule...
so i said Ji Yeon is human too, she is not a robot that doesn't get tired and have straight mood
to all ppl out there who have wrote negative article like that, pls give some understanding and be more reasonable, try to put yourself in her shoes