MHA: A hunter in the world of heroes

They run and run and run, in order to get away from their family's clutches. until they can't run anymore and one of them ends up dead and the other in another world. How will Killua react to this new world and most importantly to his sister's sacrifice in order to save his life? He will meet new people, but will he be able to become the cheerful, mischievous teenager he once was, or will the darkness of reality will consume him? ***************************************** English is not my first language, so there might be a few mistakes.