“Here,” seven-year-old Hanbin said as he lifted her hair up and clasped the necklace together. 

“What’s this?” asked Jieun, looking curiously at the mysterious metallic puzzle piece charm in her palm.

“It’s so we can always find each other. Look, I have one too,” Hanbin exclaimed as he pulled out his own necklace. 

“We’re like salt and pepper, apples and oranges, ketchup and mustard. We’ll always fit together… like a puzzle piece.