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'm on so-called night duty. 
You know, night duty.
¿Yo? Estoy ahora mismo en el turno de noche.
Eu? Estou fazendo a ronda da 
noite. Você sabe, a ronda da noite.