their are three family's, sakamaki, mukami and tsukinami, in the sakamaki family is Shu, Reiji, Ayato, Laito , Kanato, Subaru, and in the mukamin family is Yuma, Azusa, Kou, Ruki, and in the tsukinami family is Carla and Shin. Shu, Reiji, ayato, Kanato, Subaru, Yuma, Azusa, Kou, Ruki,Carla and Shin are all in love with laito, this is after yui showed up, laito only see yui as a friends and for blood of course (your laito)