aposiopesis: n. a sudden breaking off in the midst of a sentence, 
as if from inability or unwillingness to proceed

After experiencing countless firsts in his life in a mere day, Hyukjae lay next to Donghae, replaying his first tree climb, first fish catch, and so many other firsts that he didn't even know how to name. 

"How do you know all this stuff?" Hyukjae wondered aloud. 

"Well," Donghae pretended to be mysterious. "It's because I come from-"

Hyukjae waited after the aposiopesis, imagining all sorts of magical and unheard places his new friend could have come from. 

"Mokpo. I come from Mokpo." The brunet finally revealed. 

Hyukjae burst out laughing, ignoring the confused and bewildered looks Donghae sent him.