Reiko is the personal eve for the house of Mukami. She loves all of the brothers with all her heart, until a second eve appears from the house of Sakamaki. Reiko finds she isn't pleased with Yui's settle nature and lacking abilities to please her Lovers. During trial and error of trying to help awaken eve's lust and her mate's, it is Reiko who shows the troubled Yui there is no problem being a human blood bag or having mulit lovers and a true Love that just happen to be vampires.