Change out the hoodie for a cardigan, and Simon's neighbour isn't dressed much differently. Jeans and a long-sleeved shirt. All high-end name brands though. All unnecessarily expensive. He's a lot less self-conscious about his clothing though. And beyond even that, he just seems far more comfortable in first class. He seems perfectly at ease when they offer a bowl of warm nuts (no thank you) and when they come by often to ask if he'd like a drink (far more often than in economy). He doesn't even bat an eyelash any time he's address as 'Mr. Yeo' (even when it's mispronounced...).

Jun is sitting slumped down in his seat a little with his eyes closed and a pair of headphones on. It's clear that he isn't sleeping, though, and that whatever he's listening to is probably rather quiet as he opens at least one eye almost every time a flight attendant walks by. So he doesn't necessarily notice when he's given the wrong drink, but he does notice when his neighbour speaks to him.

He sits up and pulls the headphones down, turning toward his neighbour then looking between their drinks. "Oh. Oh! Oh, sorry." He picks up the water and offers it to his neighbour with an apologetic smile of his own. "Sorry, I didn't even notice. Here you go."