Jaehyuk is usually expressionless. The 1st and 2nd panels of his face are focused on where his eyes are looking and I do get a sense of longing in his eyes in those 2 panels. In all 3 panels of his face, his eyes are intently staring at Yeon Oh's face. He's had 6 months to process the rejection and since then this is probably the 100th time that he's seen Yeon Oh's face on a screen or billboard. Maybe he's accepted that he can't have Yeon Oh and doing his best not to wallow in self pity and regret. TBH I want Jaehyuk to see Yeon Oh with someone else, that would wipe the blank expression right off his face and leave him emotionally in pieces.

https://imgur.com/a/TmmCKsZ
Well, it's a blank stare, and I'm baffled that he's not looking at YO's face with longingness. Or regret. Or anything? I give him enough credit to think he'd been sulking after getting rejected. Him wearing the watch means he's still carrying a torch for YO. So.....what?