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've never met it, but supposedly
Yo aún no lo he visto.
Yo nunca lo he visto.
Nunca o vi, mas parece que seu nome
 está escrito no Livro dos Amigos.