Meanwhile Yui was spending her life in the Sakamaki's brothers mansion. Something was about to change. What would happen if yui had a little sister? What if receiving a phone call saying her little sister is coming to live with yui? The Sakamaki brothers question who is going to live with them. But they do not know she is going to change their life. Will she cause trouble? Or will she fall in love? FIND OUT!!!!! Disclaimer: I do not own Diabolik Lovers, I only own my oc (Luna).