High Quality Content by WIKIPEDIA articles! Omamori Himari is a 2010 anime TV series based on the manga written and illustrated by Milan Matra. The story centers on Yuto Amakawa, a boy who, on day of his sixteenth birthday, meets Himari, a cat spirit in the form of a beautiful young girl. He learns from her that he is the descendant of one of the twelve Demon Slayer families that had slain ayakashi since feudal times, and that Himari has sworn an oath to protect him from the ayakashi that are out to kill him until his powers awaken. He later meets other girls who start out as enemies, but later become rivals for Yuto`s affection as the series progresses. The anime follows the first twenty-nine chapters of the manga, with moderate changes to the original`s storyline.