Siwon and Yoona were the perfect couple you can ever imagine. They always smiled and enjoyed each other's company. Everyone knew this because they never fought or cried because of each other. Nothing can go wrong, right?  Wrong. Everyone was wrong. One day, Siwon dumped Yoona for an unknown reason. After that day, Siwon left without telling anyone where he went. Yoona felt heart-brokened and betrayed, which made h