It took me about two episodes to get into this show. It was initially a little too cookie-cutter for me; I've seen bullying and rich people ostracizing less-rich people in a dozen kdramas, and at this point I don't find it too compelling. But the murder mystery kept me on the hook, and I'm glad I watched the rest. The twists and turns of the mystery were really well executed, both in terms of them being interesting as well as their pacing. There was so much drama that was compelling to watch, particularly within the Endo family. The struggles and fights that they had actually echoed some that I've experienced, so while it may have felt overly dramatic to some people it felt realistic to me. I felt so tensed and stressed at various points throughout this show. The writing is clearly excellent, from the dialogues between characters to the unfolding of the murder mystery. It didn't stick the landing for me though. The final big reveal in the last episode really negated a lot of the story for me; it made me question why various things had happened because they didn't make sense with the final reveal. Previous explanations for events turned out to not be true, but those explanations almost made more sense than the real one. The final twist does make sense, in that the motivations and what unfolded seem realistic given the known facts, but in light of the truth the actions of certain characters didn't make sense. It's hard to explain without spoilers. I do think the character and relationship development that happened were well-done, so that part of the finale worked well for me. It's frustrating, because everything right up until the last episode was really good, but... darn, I wish they hadn't done that final twist.