This drama was good, but frustrating in terms of the story and some of the characters. The writing was the biggest issue I had, while being sometimes riveting there was too much back and forth, not a lot explained, wishy-washy feelings and just not enough clarity. There were a few things touched on and left unexplained I thought - such as a certain gang leaders propensity to stare at the older sister like he couldn't believe she was really there. (There is a history there, it's quite interesting, I just wished it would have been fleshed out more.) I actually would have liked to have something romantic happen there, I think the older sister deserved it after what she had been through with the second male lead. I thought So Ji Sub was brilliant and endearing, his character was probably the best written of the bunch and wonderfully played. Kim Hyun Joo as the younger sister (Kim Yun Hee) was appropriately spunky in the beginning and she played her part moderately well - she and So Ji Sub had brilliant chemistry, however I began to roll my eyes at her character the minute she and second lead met. Her character had been good up until then. After that, as much as I liked Kim Hyun Joo - she couldn't really save the affection I once held for the character. I think it was more the writing than anything. As above I mention the wishy-washy feelings, this is where it is. Kim Ji Ho as the older sister Kim Tae Hee, An okay character I felt, however she could have been so much more. Again - she was brought down by the writing in the latter part of the story, but she did have some stronger moments, more-so I think than Kim Hyun Joo. As above, I wished they had used that history I mentioned above and done something more for her, in the end she was more of a weak fourth wheel for the main love triangle and TBQH I think she deserved more. Han Jae Suk as Jang Jae Hyul, it doesn't help my review in that I never cared for his character to begin with... I didn't really get him to be honest, there was no sincerity there for me (as a character) I just don't understand how he managed to have two girls (smart as they are meant to be) under his spell. On the whole, I think there were parts that could have been done better, I liked the story - it kept me to my seat in general and I only fast-forwarded through a few bits.