Ok, I m probably rating this high because I watched it at a time I wanted an easy non serious predictable drama to kill time but it wasn't that bad to me, I mean the last 10 episodes were ok,, the first 10 were very tiring for me to watch but maybe a 7 would be more appropriate rating considering that. but all in all, I didn't absolutely hate it like a lot of people did, not even the "love is feeling" song that some hated. it wasn't that horrible to me, it wasn't an awesome song but it wasn't terrible or unhearable, it was just there for me I guess, a bit catchy actually but not the best or worst ost of the year. All in all, it was an easy watch, very predictable drama with very little happening but it worked for me. I wasn't a big young do fan as most people were though, don't get me wrong kim woo bin is an awesome actor and nailed the character but I didn't like the character either. To me he seemed like a poor imitation of his character as park heung soo in school 2013, except heung soo was better and had a more legit reason for his anger and acting out, young do on the other to felt like his was throwing a kid tantrum and his reason for being mad at kim tan was not legit and was totally his own fault and him knowing/ realizing it and still doing it anyway doesn't make him seem any better to me, it just made him more pitiful,he was as immature as kim tan if not more.but for me kim tans pain was more legit, his brother hated him for something he didn't even want, his step mother too, his father saw him as an object and the only one he had was his mother who he wasn't even allowed to acknowledge and when he told his best friend about it, he practically insulted him, his mother and turned his back on him leaving him more alone, and then threatened I'm with the information too and then being exiled abroad all alone. He seemed more pitiful to me but still that didn't excuse his immaturity for me either, I didn't like his character much either. and the main girl annoyed me a lot too as well I mean freaking make up your mind and stop crying over everything. as for most of the other characters, i didn't like them much either, I wasn't attached or even interested in any of the characters, maybe Krystal's boyfriends but that's mainly because he is cute, and not much to do with his character. Actually the only character I could say I liked was the senior, the rest of them were just a mess for me. The music was ok, not that bad, the acting was ok too, it's just the characters themselves I didn't like. The story was mediocre, average, done too many times. The Americans were horrible, the whole scene abroad was just really bad for me. I might re watch it ifI have nothing better to do and not from the beginning and by skipping through a lot but I m probably not going to re watch anytime soon. This is done solely on my opinion and not meant to influence any other persons opinion. I recommend every one give it a chance to see if they like it before they decide because we all have different taste and opinion but never watch it if you are int he mood for action, thriller, something to keep you on the edge of your seat full of surprises. This is awesome to watch for a lazy day.