Yuunoa / first love

i do not own the characters names exectr exectra. So Yuu had an abusive family thay tried to kill him so he runns away he is 6 at this point he gets out on the street and gets sent to a orphanage 3 weeks later a virus hits most pepol die but .... are hero has not finished yet ! oh and vampires are not included in this story but the monsters are .