Three Autumns passed by. Countless letters had been exchanged. But the hearts were stay the same.

Kyuhyun worked very hard in his study, upon learning that if his grades were constantly good, he would be able to secure a scholarship to study abroad. Since he was nine, and understood what an architect means, he wanted to build a house near the river bank, where he and his Hyun-Baby could watch birds and swans endlessly without afraid of getting hyperthermia.

He also gained lots of friends. An always popular boy at school, with positive attitude and warm eyes, he became student council in his ninth grade. He also met Shim Changmin at his second day in the new study. Ever since, they became partners in crime, sharing the same traits of characters as result of having the same birth months.

Joohyun had grown into a charming little lady with lovely smile. Always excited with birds and swans, she wanted to be a veterinarian since she was six. Excellent in grades and manners, she always wanted to study abroad, while taking care of her Hyun-Oppa who she knew has a tendency to get sick over study too hard.

She also gained a lots of followers. Adults and older children were enchanted by her contagious smiles, her classmates protected her because she was always an angel for them. And in her last year of  the elementary school, she met Im Yoona, a transfer student from the US. Ever since these two were inseparable, despite their characters were exa