The start

(y/n) Kuran, the twin of Kaname, isn't born a vampire. She lives in the spotlight until her little sister was born. Everyone turned their attention to Yui, everyone but Kaname. Kaname played with his little sister and never told her that he was different.
Some years later, she left and Kaname is devastated. Yui tries to replace (y/n) and she thinks she did it, but what if the main star comes back?