Korean series for many years. This series has made it into my top 3 ever. Outstanding performances, very good music with only two songs but wonderful, fabulous script, it catches you without failing in any of the chapters. I needed a series like that. He deserves my first 10 for all the emotions he has made me feel. No one should miss it. Hopefully it won't be long before I find a series with such quality. All the actors do a perfect job although logically you have to highlight the 2 protagonists. Don't be fooled into thinking it's just an action or suspense series. This series is more a story of love and improvement even