Okay, this is one of the first kdramas I've watched. Now, after watching so many kdramas, I've been asking myself why I turned a fan of Kim Seon-Ho and I managed to realize why: his male lead is a rare one: cheerful, caring and kind. Normally, male leads have only one of these characteristics (and the cheerful one is more rare). I put myself at stake saying that maybe a male lead like him doesn't exist in kdramas. You can say whatever about the plot, storyline, but I think that, without Seon-Ho's character personality, the drama would lose so much.
Love it! I wish Korea could make more kdramas with cheerful male leads. It was very fun to watch the couple, and I think it wouldn't be the same without the acting of Nam Joo Hyuk. Of course, the fact of him being a fun and upbeat character helped a lot. Imagine if his character was planned to be cold, calm and eccentric like the majority of the male lead's drama, this kdrama wouldn't catch my heart as it catched.