Kagihime

Japanese Title: 鍵姫物語 永久アリス輪舞曲

English Title: Key Princess Story Eternal Alice Rondo

Plot
The story revolves around the male lead of the story, Kirihara Aruto. The story begins one night when Aruto is up at night writing his own copy of The Endless Alice. Suddenly he sees a girl leaping through the night sky. Believing her to be the Alice he writes about so often, he leaves his house and follows her to a library. He then sees her fighting with another girl, who then was defeated. The former then steals the latter's story and disappears. The next day, she reveals herself as Arisugawa Arisu, the female lead of the story. She then explains that she is an Alice User, capable of transforming into a kemonomimi bunnygirl that uses a key in fights against other Alice Users. The keys are used to unlock the stories in other Alice Users's hearts. She explains that if a girl loses her story that she can no longer maintain her identity as an Alice User, and the overall goal of all Alice User is to defeat all others and finish the Endless Alice, as the one who does so will be granted a wish. Later, Kirihara Kiriha, Aruto's little sister is introduced. Kiriha then reveals herself as an Alice User as well, and proceeds to fight Arisu. Aruto breaks up the fight and the two make peace with each other. The trio then agrees to help each other finish the Endless Alice. The rest of the series follows their adventures together.