The story was just terrible. Most of the drama was just Lee Min Ho and Park Shin Hye running from each other then running right back together. It made the character development and story line just implode upon itself. When I first started the drama, I was excited to see Lee Min Ho after watching Boys Over Flowers but I started to hate his character and his acting in The Heirs. First off, the writer makes Kim Tan seem like a selfish guy who is obsessed with Cha Eun Sang. He keeps swearing to protect her but everyone knows all it does is just make matters worse. His vow to protect her seems to be just a sort of obsessive control he wants to have over her. His acting of being cute at some parts made me cringe even though I wanted to enjoy it because it was just so disgusting for his character. I think his character and acting in Boys Over Flowers was much more pleasant. His character there was written cutely and maturely: Gu Jun Pyo knew when to let go and didn't try to get back with Jan Di within 20 minutes of the same episode. Secondly, my attention was definitely caught by Kim Woo Bin. I ended up watching the drama for him. He portrays his character pretty well even though his character is very cruel. Many people say his actions can't be justified but if you think about it, he really doesn't know how to express his feelings properly. He's just like a little kid that wants someone's (Cha Eun Sang's) attention so he'll do even mean things to get it. I feel that his means actions toward Eun Sang arise from Eun Sang misunderstanding him. People don't consider the bully being a victim him/herself. I feel like most of the characters were just thrown in as accessories and suddenly had huge developments within one or two episodes whereas the rest of the screen time is given to Park Shin Hye and Lee Min Ho to stare at each other. Krystal Jung overacted but I got used to it and later found her and some of the other character parts to be good comedic reliefs from the overly dramatic and boring main couple. Also, I liked Kim Ji Won's portrayal of the character Rachael. I think she did a really good job and it showed because I thought the character Rachael was very cold and mean.