Hey guys! You should check this story out~ It's superb!

Title: The Heiress
Characters: Kim Ji Won, Park Shin Hye, Krystal, Oh Sehun, Lee Min Ho, etc.
Genre(s): drama, romance, mystery 
Summary: After the sudden disappearance of their mother, Kim Ji Won and her sister strived hard in order to survive. But just when everything was back to normal, a series of suspicious events started happening around them. There was only one thing that Ji Won can conclude- somebody was after her. As she tried to untangle all the lies, she began to uncover not only her identity but also secrets that might be lost forever.
Link: http://www.asianfanfics.com/story/view/963886