It is a series of novels by Takahashi Yashichirou that have been adapted into manga and anime . The protagonists are a guy named Yuuji, equipped with the feature of being unaware of a "Mistes", and Shana, a "Flame Haze" with the task of controlling the balance of the world. The title can be roughly translated as "fiery-eyed Shana".
Sakai Yuuji is a regular student until the day he meets the paranormal and Shana with it, a girl with red hair and fiery eyes. Shana is a Flame Haze that aims to hunt down Crimson Population ( Guze no Tomogara ) and the maintenance of the world through this procedure. Yuuji After showing him the truth about the world and explained that he is a "Torch" special, decides to protect him. The inhabitants are from the United Crimson Crimson and steal the energy that forms the world, the "power of existence" by the people who inhabit it to use it for personal ambitions.