u're the sibling of the Sano siblings¦Shinichiro he is25years|Izana he is18years|Mikey he is15years|Emma she14years|and the grandfather who owns karate training club¦ur mother abandoned u and took u ur grandfather's home to lives there, ur mother is the second wife of the father of the Sano family u have already arrived at ur grandfather's house,and now your grandfather has gathered u with ur remaining siblings so that they can get to know u Grandpa:Now Everyone,your sibling live with us