You and wonwoo were highschool lover back then. Both of you were top student so you both were quite famous and very active back in highschool. he had his own dream and so you did. You both ended up separate to achieve your dream.

And now you're having a highschool reunion. he's standing right behind you while you're talking with your old friends.

All of sudden your friend went quite and look at you with a small grin on their faces.

"it's been a while" someone spoke behind you