I just accidentally watched this while looking for another drama aside from Scarlet heart: Ryeo!!.. And by the music alone, it made me think that this was a Youth drama (and at my age, I should not be watching those kinds!, hahah), in Joseon era!!.. Wow, that was awesome!!.. Knowing that this should be dark and heavy, they made it comical and lighter... I really hate serious historical drama, it will make me bored!!... It's enjoyable to watch and I really learned a lot!!.. Dialogues and lines can be used for daily quotes, very inspiring!!.. Kudos to all casts and crew!!.. Knowing they are all young and yet they made this series so perfect!!.. As well as those senior actors, bravo!!... This went up to my all time favorite saeguk, after Sungkyungkwan Scandal... Both from KBS, a great network for delivering top quality Kdramas, and of course if it's from them the OST's are always top notch!!.. Surely will re-watch it again, and it deserves a high rating which actually 20% (+/-) is not enough, should be more than that!!