Lee Joon Suk (a cutie) who plays the character Cha Eun Ho was very believable. The actress Lee Na Young who played Kang Dan Yi is equally good. I love this storyline because it brings awareness of age differences between two romantic partners. I think this is great. Some don't look their age and even look the same age as the person they may be connected to. I believe usually a 10-13 year span is okay. Some just have good genes. The Romance Chemistry was definitely there. The other cast members did really great as well with that said, Thank you!