The one where kiddie Chanyeol falls in love at first sight with the cute foreigner at the airport 

“But I swear he got on the flight to Korea…”
“Forget it Chanyeol, he’s gone now.” Baekhyun blew at his hair, staring at his best friend, who looked like a lost kid, looking all around the airport.
“Do you think there’s a chance I’ll ever see him again?" 
The pout on his best friend’s face was too cute not to give him the answer he wanted. "Korea’s not too big, you just might.”