One day Yui gets a letter from her older sister, Yuki who saids she'll be moving in the mansion with Her and the Sakamaki brothers. Yuki is an adoptive child who was taken in by Seiji Komori. What will happen when this badass beauty moves in. Will she get them all to fall in love with her? Did I mention that she's no normal human and her father is??? I do not own any diabolik lovers things or what ever. All credit goes to the creators and yeah you know.