I give my first love to you, the drama, was, at least for me, better than the movie. Coming out almost ten years after the movie, it explores the story better, with a more in depth exploration of the characters. Overall, the love story was cute and sweet, though the ending was a bit open I think. In any case, anyone can interepreter it differently.
In addition the performances were good and the leading lady was especially likable and adorable. I also enjoyed the fact that they added more side characters to the drama, though the second love story was so so. Plus, the pace of the plot was good.
So, 7 out of 10.