they were orphans they never met they’re parents so Herobrine they’re teacher adopted them,he adopted Zombie,Skeleton and his older brother Wither,Enderman,Ghost,Slime, Crepper and Pigman,they not only live with everybody but they are his students too wich they do challenges for survive. Zombie is the only monster who doesn’t have any powers,so Wither is his bully,he bully Zombie for everything,the friends of Zombie try to stop Wither but they couldn’t,Skeleton always try to talk to Zombie but Zombie hate Skeleton cause he is the younger brother of Wither,so Skeleton needs the help of his friends to become friend of Zombie but before he ask for help he realise that he loves Zombie,so he doesn’t want to ask him to be his friend,but he will ask his friends how to let Zombie fall in love with him