I would love this show if they were presented in neater order. What we have here, let's check: a dystopian world, people struggling to life in harsh environment, everything clouded in dusts, they needed oxygen badly, there were a team of guys who delivered the necessities, called deliverymen or black knights, employed by a big corporation. There were also a deliveryman wannabe kid & a major lady & the conglomerate's ambitious son.
Now here the story went on. The kid got shot point blank. Was he dead? No. Turned out he was a mutant. What? Really? Was there any mention of it before? No. Now, they made up things further. The seemingly healthy conglomerate's son was in fact ill. He kidnapped people to use them as test subjects to find the cure. You know exactly how it would connect to the mutant plot, right? But the order of the story was wrong at all.
The fx was good, but sometimes felt cartoonish. No, i don't mean the anime portion in the beginning. The music was average. The acting quality was the same like any other kdrama standard.