In my opinion, their relationship's getting better
Shin don't wanna be involved in gang violence so keep push Jake away even he's actually attracted by Jake
Jake knew that what Shin's care about or what Shin's afraid of, Jake could always knew Shin's thinking.
besides Jake's not a patient guy to other people but he treats Shin patiently and gave Shin all he want
Shin was struggle with himself to if he should fall in love with Jake
Shin knew Jake as a gangster should be merciless and dangeous there shloud no love for Shin
the other hand Jake always showing his kindness and possessive to Shin
Shin's getting harder to refuse to Jake little by little
It's not that Shin doesn't do dirty things , Shin just don't wanna fell to the helpless condition like he was kid once again
It's he's kind of trauma.
Trauma could be cure when you face on it
maybe it will tears apart again but Jake's love could keep the pain away from Shin
(hope my poor english you guys could understand )