Ok, I read it and found myself asking, "Why would anyone do/say something like that?"
There are a lot of unnatural behaviours in this.
First of all, the way the "boss" spokewas a bit unusual. Maybe perhaps adding a bit more slang and phrases ( anything would do, but he would seem like the type of guy to talk in such a manner).
Secondly, it struck me as odd that kazuya would have no suspicion that it was Ichi-san who called the police when he calls out, "How are you calm?!"Even after he was spotted with cops. This type of world seems like a place where you can't trust anybody.
Thirdly, the policemen turn from "lawless" to "merciful" pretty suddenly. Either keep one concept or the other, as it makes it very unnatural. Why would they decide suddenly to just not kill him. Even if they did explain why, it still was a pretty peculiar action.
Question: why would Kazuya want to save the boss? Was is set up to be a hate-love situation? The way the boss flung him out with a sort of no-nonsense attitude gave off no warm feelings.
The last obvious flaw was why Jonathon wanted to help him so fiercly, as to threatening to kill someone for his safety?
Also the pacing seems a bit fast in my opinion too. (or perhaps it's just the format)
For good points, the story itself doesn't seem cliche or seem to have an obvious plothole anywhere (as of yet), but future chapters will answer this question for me hopefully.
Also try working on outlining the character's personalities, because I feel a bit in the dark with most of them.
I patiently await for the next segments.