What and why is Yoona doing for Jang Keun Suk? May 14, 2012 by tenshi_akuma (Japan) @MyloveKBS Let me give you a clue. Yoona’s hand! The answer is Yoona was tapping JKS’ shoulder. Because he gave her a piggyback before that. Was it too easy for you? What do you think his facial expression looks she was too heavy for him or not?