Even the supposed plotholes is forgivable because of the immaculate story writing. Many may call the narration order messy but that's the fun part, like someone said this drama doesn't spoon feed you into understanding the plot, personally keeps me guessing and on my toes until the very end. Although it has been 3 years since I've first watched this drama and have continued watching many others, this somehow still stays on the top. I'm confident when I revisit this drama 10 years later I'd still feel the same way, it's one of those dramas for me.