I generally like Korean dramas more than Japanese ones, but so far the Japanese is a league above this version. Not only is it missing a memorable end theme, but the connection between the kid and teacher hasn't materialized in the same degree at the points in the story. I'm sure I'll still like it and I'm curious what they are doing to the bigger changes in the characters as they seem to be hitting all the same plot points.
I checked it out because it was so highly rated, but the conclusion was very weak; so many loose ends were just abruptly cut. I'm only disappointed because I expected something spectacular and it was just great.