I watched this drama almost a month ago. I like it very much and cried a lot especially in the early episodes where the young characters were well-played by the young actors. Great chemistry and good story line for the entire episodes.
However when the characters grew old and became adults, it did not carry the same 'feel' as before. The chemistry is lesser than before. But it doesn't really matter anyway. The story was revolving a bitter childhood life of the main characters, then finding the first and true love and also tragic-desperation but happy in the ending.
It was good and I have no regret watching it. I give like 8.5 out of 10 for this.