How wonderful would it be if people were really simple? She didn't know his heart or everything he did for her. She always thought that he had failed her. In fact, she is not the only one who is unfaithful? At that time, she was sixteen years old and seemed to understand but not understand. Three years later, she thought she had matured and could no longer be emotionally affected by his every move. But so what? His reappearance and his infatuation deeply touched her, causing the wall in her heart to melt again... Those green years left only the bitter memories now.