I f*cking CANNOT with some of yall in the comments
YES Jiyun messed up BIG time and caused Chiwoo to be wary of him, up to the point where cutting him off seemed to be the only resolution. Jihyun's temper was also a big red flag, he acted immature but you also need to consider the fact that Jihyun grew up in an abusive home, which highly impacted the way he handles his feelings. Of course it's not of enough valid reason for him to treat Chiwoo the way he did. However, I truly believe Jihyun truly loved and cared for Chiwoo, and just didn't want to lose him.
on the other hand, Kyujin seemed like the green flag at first.. I mean, he was always there for Chiwoo, helped him whenever he felt lonely, supported him and stayed with him despite the backlash he was getting from Jihyun. Maybe it might of been the best decision to date Kyujin... but as we can see in these chapters as well as previous chapters, Kyujin's very manipulative. Always grabbing Chiwoo and pulling him away, or guilt tripping him for something that made Kyujin upset rather than considering Chiwoo's feelings. And in these past chs, it looks like Kyujin is mainly s** drived, forcing Chiwoo into situations he doesn't like, without seeming like he is. That's toxic as is, and yall defending him ?? .. yeah, no.
overall I think Chiwoo should've just stayed away from both guys... they each have their red flags, neither should be defended