Just my opinion

I think Wuyeon blame Jin Woo and Jaeha hate Jin Woo cuz the first person who interested in Wuyeon was Jaeha. Jaeha tried to woo Wuyeon but I think Jae Ha have a psycho personality like lima syndrome. Since Jaeha have that kind of personality, Jin Woo tried to help his bro Jaeha to make him feel jealous but it turned out to be something worse than he could imagine, Wuyeon did seems like interested in Jaeha but after Jin Woo tried to help his bro feels jealous, he blamed Jin Woo for what he did to interfere their relationship when he knows Jaeha have that kind of personality.... I know it's totally that psycho fault too since he's unstable... What can we do since author want this to happen huhu