To keep it shortly:
I searched for a short but awesome drama, and here it is.
At first I was very confused, really. I thought "What is going on here ? Did I missed something?". But when you watch the next episodes, you'll understand. Haha.
The story is kinda depressing and gangster like stuff, but I really like that. Yes.. sometimes it's really sad. To answer maybe some thought about a love story. No, theres not really a big love story. But the story is really awesome. The actors are great and talented too. I don't want to say many details about what is going on in this movie because you really need to see it yourself. But what I can say about the story itself.. they could have made more of the story. Especially at the end. That was a bit disappointing. I expected more, but everyone sees it differently.
About the music. I did not hear any kind of OST there. But I think that this drama don't really need one.
Would I recommend it? - Yes.
Would I rewatch it? - Of course and maybe not just once.