Hayate wants Nagi to attend school on a daily basis. One day, however, when returning from school, Nagi forgets a notebook, and as her butler, Hayate goes to the academy to get the notebook. However he arrives at night.... in an area that's supposed to be haunted!
What are you saying? 
A student's duty is to study.
¿Qué está diciendo? El deber de un estudiante es estudiar.
Do que está falando? A obrigação 
de um aluno é de estudar.