All of their letters had these written in the beginning:

How have all of my 13 childhood friends been?:) I hope that you will all still remember me, Jung Ailee or also know as Jung Ka In. Once I stepped into this school and saw you guys so famous, so popular, I was proud and happy for you guys. But once I noticed you were all bullies, I disliked that about you all. You all changed from that nice kids you were to bullies which used to bully us. :( I was really sad when you all picked on me. I did not dare to tell you all who i was yet as i wan afraid i would pull your statuses down:P 

        By now, I can say that I am already with my passed on family and you guys are now reading this:) please do not dwell on the past. Its not your fault. I hole that you guys will be successful next time in your future!;) hwaiting! 

PS. Read the private letter:3

At the end of this small passage, Ga Rin was already screaming and crying ,"AILEE!!!! NOOO!!! HOW COULD YOU NOT SAY IT!!! AILEE!!!!!! AILEE YOU WAKE UP NOW!!!!!" Kris had to hold Ga Rin back but almost everyone had tears in their eyes.

Chanyeol was the first to read the letter, the private one:

Hello my dear "husband" ;) remember when we were kids we got married together secretly in the garden?:3 I still have the ring and it is inside the envelope now. I still remember the childish days where we both said ,"I do" and then Xiumin said that we were officially married. Then you kissed me, pecked me on the lips to be exact. I still remember the day, that wonderful day I got married. Chanyeol, I love you with all my heart and you know it. But you have to move on ok:) pls do that for me. 

I love you my happy virus♥

Your first "wife" ~Jung Ailee/Ka In

Chanyeol fell to his knees and cried. He ran to Ka In and shouted," you promised to be there forever!!! You left!!!! You said you would never leave!!!!" He cried while grabbing her cold hands. 

Sehun was next and he shakily opened the letter :

Hello my wonderful maknae;) I hope you still remember noona, the only noona who buys you bubble tea everyday:D don't tell chanyeol, he will kill me:P I hope you will have a happy life with your wife and bubble tea. Help me to tell your wife not to buy so much bubble tea for you:P

From your awesome and loving noona~ Jung Ailee/Ka In

Sehun's tears streamed down his face as he sat down and mumbled a few regretful words.

Baekhyun was next :

Heyo bacon :D still remember music gal? Me? Well u better or else I will haunt you:P jkjk 

So bacon, have you found your love?:3 eggs maybe? And ya! Don't steal my channy from me or his wife! Haha anyways, get a love life Kay?:3 I wan to see your girlfriend , I wanna see her smile at you everyday so you don't have to keep gossiping about channie's love life :P

From ze awesome music gal ~Jung Ailee/Ka In

Tao's one said:

Hello AB style kung fu panda!!!! :D still love pandas? Well you better!!!>< if you don't imma haunt you down:P Tao you better love em so I can still quarrel with you over which is which, red panda or pandas. Haha:P you will find a panda key chain in this envelope. Keep it Kay?:)

~Awesome red panda lover ~Jung Ailee/Ka In

Chen's said :

Heyo lightning Chen Chen DA troller;) still trolling? Keep it up Kay? Tr