You got into an accident when you're 18. It's your birthday that day and you got into a car accident that lead you to forgot everything.

Jungwon is your step brother. But you two have a deep relationship than that before you forgotten him.

You treat Jungwon as your older brother since he's 2 years older than you.

He never told you the truth because he doesn't want to cause stress to you.

You two enter the same university. Jungwon is always with his friends.

He never told you that he's not just your step brother, because you have a lover now. And it's one of his friends Sunghoon.

Sunghoon, Sunoo, Jake, and Niki doesn't know that you and Jungwon have a relationship before you got into an accident, but Heeseung and Jay know about it because they're the one that Jungwon trusted the most in his friend group.

You all are now in a vacation since it's summer break.

You all are having a story telling, but you just keep silent since you don't remember anything about your past.

Then Niki ask "Jungwon tell us about your first love experience!!"

Jay and Heeseung just look at each other. They know everything.

"Hmm? My first love... It's great. We both feel the same way... She's the most precious thing that I have, and she's such a pretty girl... But some incident happened and I never saw her again" Jungwon said. It's quite a lie but also not. Because he never saw the old you again, ever since you got into an accident.