Ok ummmm how is nobody talking about how he was raped by seungjae???? He literally pushed him away cause he was reliving experiences from his past relationship and seungjae just forced him, HE EVEN SAID HE HAD A SIMILAR LOOK IN HIS EYES. I would've liked the story and the way they shined a light on abuse, but the part just wasn't it for me and the way they romanticized it.
No, he thought Seungjae's eyes were different from others who just hurt him for pleasure (I think he meant the men other than Minwook, since he wasn't sure if Seungjae had feelings for him at that time). Later when he pondered whether there was love between them or not he thought Seungjae's look seemed similar to Minwook's when he said he wanted to break up (I think in a way that they loved him and wanted to have him) but aren't exactly the same (I'm not really sure, but maybe it's the motive behind their anger. Minwook's was because he didn't want Geumhwa to leave him, while Seungjae's was because he knew they couldn't be together so maybe there's also bitterness in his anger). I don't mean to defend Seungjae, what he did was wrong and I actually agree with your last sentence, I just want to present another perspective to Geumhwa's thought.
I WANT NAKYUM TI HAVE SO MUCH BETTER, they say seunghoe had development