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 am an impostor who pretended to be him.
Yo me hice pasar por él.
Yo sólo soy un farsante que me hice pasar por él.
Sou um impostor que se passava por ele.