Koo Hye Sun and Lee Sang Yoon didn't seem to have any chemistry between them in this drama,when they joked around or laughed with each other, everything seemed force,at least in her part,not natural for her,feel like the director told her to laugh or smile then she did. When she heard his sister name, she just stood there after he introduced that's his sister,till the director told her to act happy,then she finally did, even if he only said his sister name, she should recognized it right away,but she just stood there like a statue, then after she got the signal from the director, she finally showed her expression. Kang Ha Neul and Nam Ji Hyun seemed to act much more natural,more chemistry between them. Especially, Kang Ha Neul, he acted so natural,his acting was phenomenal. I didn't enjoy this drama as much because of Koo Hye Sun bad acting. I don't feel the connection between her and Lee Sang Yoon when they supposed to be in much in love.
I give 3 stars because of interesting story and from other good acting in the story. I like Teddy too.