Even if ji ung told her that she's getting cheated shes not gonna believe that. 'cause she thinks that ji ung wants to prevent her from dating bad guy. Refer to early chapters where he tried to stop her from dating that bastard
shes selfish asl just wait till you get to the newest chapters you're gonna hate her
Maybe its because hes exploded because of all the endurance he did in the past for trying to become good. Later on, the reason he became 'bad' aint because of the girl anyways, he even rejected her because hes sick of it
Im still on ch.6 and from the comments many readers like this but why would ji ung do that for a lame reason? I think it doesn't make sense that he thought of being a bad guy like those bully just for that girl right? Why wouldn't he just helped her and tell her that she's getting cheated? ¯_(ツ)_/¯ anyways I'll keep reading since i kinda like it (≧∀≦)