I won't post a long review, because truly going into this knowing nothing is the best approach.

You want to see a drama with complex characters? Gray storylines? Uncomfortable themes? This is the drama for you.
Apart from Naomi (and Mayuko's mother i guess), not a single character in this show is white or black. EVERY ONE IS GRAY. I didn't want to root for anyone. It was a mess. A chaotic mess. I loved it!

The downfall was that with this amount of grayness, complexity and the amaaing pilot episode, I was expecting something to shock me. Some twist that I didn't see coming, or some character back story that catches me off-guard. That, however, didn't happen.

But, I'd still recommend it for the characters (and it's only four episodes, so you're not wasting too many hours).

Oh, also. The music. A-MAH-ZING! The background score was absolutely beautiful, worked so well with the scenes. Since I'm not the technical person for it, I can't put it into words, but the music enhanced the experience so much!!