Well, I don't see a point in sunbae's words. Every relationship can go wrong and even with the right people it can't be perfect. He doesn't even know the guy, he judged him bc of his look and the fact that he's a celebrity's child the second he met him. Plus I don't really think he says it bc he's really worried, he just realized he fucked up and wants her to himself, but he can't just say it bc he's a coward and knows how it'd look. I can only say that he's not the best 2nd lead material, so I can ship the main couple peacefully and not feel bad for him like it happens to me when the second guy is as good as the main one.😅