"I've known thousands of guys, and yet I couldn't find my Perfect Boy." -Im YoonA

SNSD's Visual, YoonA, kept searching for her Perfect Boy. She has gone through lots of relationship, and neither one lasted long. Until, she met TVXQ's ChangMin. She thought that he is her Perfect Boy, but one proved her wrong. During one of her filming sets, she noticed that someone is making her more happier than ChangMin. She feels safe and secure whenever he's around. His shoulder is always open for her to cry on. Who could possibly it be?