You live alone with Villia on the outskirts of the capital and close to the forest. Your father and mother were killed by dark creatures who ruled various countries. Villia works as a slayer of dark creatures, because Villia is very skilled in fighting. Villia wants to keep her job a secret until you a grows up. Villia now only has you as her family, she wants you to continue to be protected from dark creatures that are very vicious in attacking anyone.