You and hyunjin are best friends since childhood, you guys are neighbors..Your parents know each other since they were kids so you kinda grew up together..

You had your own friends and he had his own, but his friends knew you and your friends knew hyunjin.

The school organizes a prom/ party When they announced it the school ended and you waited for hyunjin outside

When you say him you smiled and waved

He saw you and smiled then he said

"Heyy!!"