This collection of episodes from the anime series follows the adventures of Kurusugawa Himeko and her best friends, Himekawa Chikane and Ogami Soma, whose lives change forever when Himeko turns 16 and awakens an ancient evil. Now, with Himeko and Chikane playing the roles of the Moon Priestess and Solar Priestess, respectively, Soma is in a bind for two very valid reasons. First, he's in love with Himeko -- and second, he has to kill both girls.