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!
I see. Incidentally, we are here to study 
for our midterms, Hayata.
Entendo. Coincidentemente, nós viemos 
estudar para as próximas provas, Hayata-kun.