When Nadia was 12 years old, she had a best friend named Kyungsoo, which was 13. (Though he liked being called D.O. better) One day, they went to the park. But D.O. was never happy that day so Nadia went to ask him what happend. D.O. said that he will be moving to China and stay for 5 years next week. Nadia broke down to tears and nobody will make her happy until the next hour. When the week comes by. Seohyeon waved goodbye to D.O. 5 years past, and Nadia was now in colleg