[ Junseo's expression falls immediately. He doesn't know what he did wrong to make Jinseok suddenly turn cold on him, which means he doesn't know how to fix it. Not that he usually knows how to fix it when Jinseok is upset, but he goes to his default that usually seems to (sort of) work.
Junseo immediately latches onto Jinseok's wrist, holding it, but not pulling on it (pulling on it would just make the mood worse). ]
Jinseok hyung, I'm sorry!
[ Sorry for what? He doesn't have the foggiest, but he's apparently supposed to be sorry about something, because Jinseok looks pissed off. ]
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Junseo immediately latches onto Jinseok's wrist, holding it, but not pulling on it (pulling on it would just make the mood worse). ]
Jinseok hyung, I'm sorry!
[ Sorry for what? He doesn't have the foggiest, but he's apparently supposed to be sorry about something, because Jinseok looks pissed off. ]