I was hooked almost immediately. Stories within a story, lacing together. Suspense, violent action, nasty bullies, vengeance, abusive childhoods, friendship, loss, trust, love, tears and laughs. It's all here.
No character is perfect, but so many are more than likeable, flaws and all. The baddies really are evil.
So Moon, Mo Tak and Ha Na probably develop the most as the series progresses. One matures, one is able to find themselves and reconnect, and another is able to face up to a guilt ridden past and open themselves up again.
Ji Chung Shin was a character I couldn't help but feel for. Vulnerable to manipulation and a harrowing past, I didn't feel at all guilty about wishing he could somehow be redeemed and freed of his demons.
I also loved the OST, with tracks from the brilliant Isaac Hong, Dvwn and Sejeong.
I will definitely watch this again and eagerly anticipate series 2. Do NOT let us down, Netflix!