It deserves more than five star. I kept guessing whats maybe next who is what even in my dreams lol by this you can say this drama is really addictive, interesting, full of suspense and learned something *spoiler alert*(don't Read if you haven't watched the drama because this suspense is what makes the drama more interesting)
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I felt the pain of little Bareum, if they didn't labeled him as psychopath, didn't made him felt as someone who doesn't fit in socity and loved him which he was seeking as kid and told him that he is perfectly normal maybe he would have grown up perfectly happy loving kid, this is what I learned from this drama.