What would have happened if instead of Vivi Arthur had been Lewis's boyfriend...? What would have happened if instead of Arthur Vivi had been possessed by a demon in the form of a bonsai plant...? And if Mystery had not existed..? If not that there was another pet belonging to the blonde...? What if instead of a Japanese samurai from the past it had been a knight who became a king in medieval times...? It's not just an Au Swap swapping Vivi's arm for a robotic one, oh no no, their roles will be swapped ALONG with their past and powers as their dynamic in part. Welcome... to MSA Swap AU