This series has probably the worst case of plot development/planning I’ve seen recently. The main issue is the wish to be different and way too mysterious. BoC loved saying this was the first BL with a murder mystery and that’s where they got it wrong. The first 4 episodes are terribly boring. Nothing really happens, while a lot of things happen. But how? It’s all filler.
Once the flashbacks are introduced, the series is light years ahead in terms of quality and actually starts to have a story. Episode 5, out of 12, is when the series really happens for me. BoC missed the mark by not including flashbacks since the first or second episode. We don’t even meet the main character, Non, until episode 5, that’s a bad move.
Regarding the ending, everybody dies is the best case scenario. I didn’t think BoC would actually go for it. The only character I could see living and it working well would be Tee. Being alive is his big punishment after causing everything that happened and literally killing his boyfriend, the only innocent person. Saving Jin would be a major letdown, since he actively caused Non’s spiral and helped destroy his life with that video. All because he was jealous.

I love Barcode’s original song for the series.