You and Wonwoo have been best friends since childhood because your parents were best friends. Wonwoo is an introvert, while you're the opposite. But Wonwoo often acts spoiled with you and his family, even though he seems like a cold person when he's with other people.

He often even has dinner with your family or you have dinner with his family. But tonight, Wonwoo suddenly knocked your bedroom door. "Hey, it's me." he said.