First, the writing sets the mood perfectly, and the characters are already very appealing. The cynical tone suits a novel of this kind very well. The grammar and editing is actually pretty good. Usually, the biggest problem for people on this site is the grammar and editing, but you actually paid close attention to this overlooked part of the writing process.
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The plot hasn't really kicked in yet, but I really do think you're setting it up rather well. Honestly, one of the only criticisms I have is you should work on painting the setting more. A majority of your writing is on the characters but not enough of the setting or the description of your characters. Let your readers know how the character views the world.