It's truly a masterpiece. When I began watching, i didn't know it would be this good. I just began watching it because To The Beautiful You was over, but got immediately hooked up. The story itself is a masterpiece... if you saw it already, you know how brilliant this drama is, it's not the typical drama, and it always surprises you, so you never get bored with the story. The acting and cast were simply stunning, they couldn't have chosen better actors and actresses for this drama. Song Jongki plays the main lead in such a way you'll be missing him badly when it's over, the rest of the cast are simply amazing, they don't leave you desiring other cast. The music of this drama is also astonishing, since the very beginning, the main theme leaves you breathless, the overall soundtrack for this drama would be one of the very few I would actually buy if I had the chance to, even Song Jongki gets to participate brilliantly on the soundtrack. On rewatch value, I give it a 10/10 I know I will be definitely watching this again when i have spare time, I could watch it over and over, and it wouldn't be tiring, because it's just that interesting, and you keep noticing little details you didn't before. Every bit of this drama is worth watching, overall I would recommend this drama to everyone, this won't disappoint. This drama has to be the drama of the year.