Your mom is was marry with a guy but then the guy break up with your mom Your mom is was really sad but one day he find a guy who really love her so you And your mom go to that house there was 4 guy who look at you itsuki look At you Itsuki: oh hi you are our new step-sis? Mh.. he look at you and blush Hikaru: hi im the little one of this family! Akane: he look you with a rude look and ignore you Izumi: wait what a step-sis? No! I not Accept it he go to him room and lock himself in