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 promise I'll protect you 
and return you to your home.
Prometo protegerlo y 
llevarlo de regreso a casa.
Prometo protegerte y llevarte de vuelta a casa.
Prometo que você voltará pra casa são e salvo.