Sewers & Night Skies (a kpop fanfic)

Above ground level of Seoul lies the huge busy city as we all know it.
But what lies below it?

What's your name? Are you rich, poor, a woman or a man, a person with status or a simple nobody...who are you in the world above?
That's not how people are judged underneath. The people here only care about one thing. And that's on how long you can last in their arena.