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!
Some youkai have to spend a lot of
Bueno, hay algunos ayakashi que con el simple hecho 
de bajar al mundo de los humanos se sienten agotados.
Bueno, es que hay algunos ayakashi que con sólo venir al mundo de los humanos se sienten agotados.
Alguns youkai precisam gastar muita 
energia para pisar em terras humanas.