With most drama's, when they do a 2nd season, its usually not up to par with the first, this was not the case with this season. I was absolutely riveted watching this season. Where as with the first, I loved it, was into it, but not "Please don't take me away from my computer" into it. The 2nd season, despite everything going on in my real life, I finished in less than 48 hours, I was that into it. As to why... The story, its written so well, you can picture yourself there, and figure things out with them. With this season, they messed with your entire thought process, not just some, if I could cuss in a review I would word that differently, but I can't. The actors really brought this season home. Most of the actors were the same, so you were already comfy with them. But, and this goes back to the writing, with this season you see the main character become more human, his growth is amazing. I noticed the music more this time around, and it tended to fit the drama well, so I gave it a higher score. This is a definite re-watch, just because I might have missed something. Overall, if your in a funk, want something different from the normal Kdrama, watch BOTH seasons.