Saint October

Saint October (セイントオクトーバー, Seinto Okutōbā) is a Japanese anime television series created by Konami Digital Entertainment and animated by Studio Comet, and premiered on Chiba TV on January 4, 2007 in Japan. It was adapted into a manga series by Kiira, which was serialized in the Japanese magazine Monthly Comic Blade published by Mag Garden in August 2006.

Plot
Whether it is the future or the past it is the world of fantasy and horror hiding in the shadow of the demon city. In the city, consecutive mysterious incidents that cannot be solved by science have occurred. To solve the incidents, they gather three girl detectives possessing special abilities. When Kotono Hayama encounters a boy who lost his memory, the wheel of the story begins to move but slowly. Then, solving the mysteries, the three girls will confront the fate that will influence the existence of the human beings.