Natsume is at home early one evening when he hears a knock on the door.  He sees Tohko outside, asking to be let in.  But when he opens the door, there's nobody there, and a gust of wind rushes past.  Another Youkai is after the book of friends!
I was a little worried since it was dangerous for a human
 to be so deep in the mountains.
Estaba preocupado porque las partes 
montañosas eran peligrosas para los humanos.
Me preocupaba que paseara por allí ya que las partes montañosas son bastante peligrosas.
Estava preocupado de ver uma 
garota humana no meio das montanhas.