" Yuki, she will destroy this world and enjoy every minute of it. Only you can save us now, hurry now run. Don't look back just run until you find him. Then he'll remember you, but this is the beginning of the End "
Yuki Komori is Yui's Older sister, although they don't look a like and don't usually get along they both care about each other deeply. Yuki was always the girl who was lonely until she and Yui where sent to the Sakamaki mansion.
The Sakamaki's are suspicious about Yuki, and when two unwanted guest come to ruin everything the truth will be told. Everything will come crashing down to destroy Yuki, and she'll have her diabolik lover to save her.