Lock and Key

hey guys this is the the pre-quel of the story of taeny 2014 and taeny 2013( I will post taeny 2013 if im done copying this story ) and this story is not mine its from author of AFF who let me copy this.
http://www.asianfanfics.com/story/view/626622/taeny-the-beginning-snsd-taeny-taeyeon-tiffany