Even after Camio reveals himself, William remains concerned only with his grades and tuition and tries to distance himself from the demons and their political war.  Unfortunately, he soon finds himself roped into another problem when the Headmaster asks him to find the source of a mysterious singing voice that's been disturbing students late at night.
If I think of it as a sort of 
training, it's just tolerable.
Pero no es tan duro si lo
 tomo como una prueba.
Pero no es tan duro si me lo
 tomo como una prueba.
mas pode-se tolerar se encaramos 
como uma espécie de treinamento.