10 years back......

"Yoona, have you brought the letters I told you too."

"Yeah, those stuffs you ask me to do so that you can read the letters I wrote once a week even if one of us is dead..."

The teenage boy pecked a soft kiss on the girl nose. 

"Aah, Yoona, stop being cute <3 But can you promise to stay by me forever?"

"No, I might want to find another guy." The girl chuckled.

They ran around and play happily without knowing that fate is trying to separate them...

"Aunty. where are you bringing me to?"

"Luhan, listen up, your parents are now dead and we are in a big danger, we could die any minute"

"But I have to tell Yoona first, I can't _______"

"Shh, no more 'but' Lu, got to go."

A/N

Here's the prologue. In the comment below, I said I will update that Tuesday but didn't. Well, I had to stay at Korea longer cause my aunty wanted to. She leave there alone so since it's school holiday here in my country, my family and I stayed with her..I can post now because I am in my cousin house which gladly, got wi-fi.. My aunt house is in a village so no wi-fi... Sorry for not posting..Bye!Had a good day