Disguised as revenge against bullying, this is a tragedy in full form. This review is coming to you with teary eyes that mourn what is lost, but also a satisfaction of having watched a really good drama. Excellent storytelling. This is how to weave in a flashback story. A screenplay that reveals a layer in every episode, acting that does justice to the story.
I started out thinking I was in a dark mood but I actually realized maybe I wasn't, half way through ep 1 or 2, but the story was too interesting and I was just boiling with anger, eager to see retribution at the world. Before I knew it, the anger turned to sadness and by the end, it was a mixture of both. Some knots cannot be undone. They will remain knots forever. That is the price to be paid.

Giving it a 10/10 as it was well-executed in my opinion.