In the versions I shredded, I had all three running at the same time, you know how complicated that is to write, depending on the other characters interactions with the MC.Do you focus more on the love route or corruption or NTR?
I must admit my versions tend to be a lot more violent in nature than the original story because that's what I tend to see in society today, and possibly deep within myself if truth be told, I harbor grudges.
The original gang members and other criminals were not at all realistic IMHO.
PS. I have known a lot of dodgy characters in my life, and there are still plenty around here today, I know how they work and tend to avoid them now.
Judging how they will react to any situation can be a lottery, most are mentally unstable and unpredictable.
Manipulative females?, bitches?, oh yeah, plenty. Like em and hate em in equal measure
You have to remove any idea that a hardened criminal has any humanity in his soul whatsoever before you face them, self preservation is all.