Fallon was Ashton's (aka chipmunk) best friend,
She was in love with him,
But he loved someone else.
So instead of telling him she writes letters she will never send to try to numb some of the pain.
Seungcheol was my childhood friend. He were so caring and a loving person until my girl bestfriend met Cheol. My friend is always with me because she want to see Cheol not knowing that my girl bestfriend has a crush on Cheol and she knows that Cheol was my childhood crush. She wants to betray me using Cheol.