The Wolf Demon

Ookami and her older brother, Chala, grew up in America, being taught by their mother Kashe, a well known Exorcist, but when tragedy strikes in America that puts Kashe in the hospital, dying, she gives an old friend a call and signs her daughter and son up to the True Cross Academy.
How will Ookami and Chala deal with the challenges that are in their way to become an exorcist? Will their classmates and other beings become suspicious of Ookami and Chala?