My reviews almost always have spoilers, so I will keep it short so I don't spoil anything.

It is true that this drama is flawed, but I enjoyed every minute of it. It is very suspenseful, with creepy characters (most of the times creepy characters are far more enjoyable than nice characters) and a mystery that you can find in any Agatha Christie book. In this episode you will suspect of A character; next episode would be B character.

So there are still many questions unanswered. And that ending was O_O so unexpected. Like WOW, I was-left-speechless-kind-of-unexpected.

I wasn't going to watch the SP, because I didn't have any interest in Shota's and Nana's love story, but I surprisingly liked it. Will definitely watch the sequel, no doubt. In fact, can't wait for it.