Izumi, Miki, and Risa invite Hayate and Nagi to their school club which Hayate uses as a way for Nagi to socialize.
That strangely, the rattling sound 
was louder than usual somehow.
Ese sonido de las ventanas era extrañamente 
más alto que de costumbre.
Esse estranho agitado barulho,
estava mais alto que o normal.