Natsume is jumped by a group of Youkai trying to steal the Book of Friends for their master. Once captured, Natsume discovers that an old problem is back in a big way.
He said it was because he 
wanted them to stay smiling.
Me dijo que quiere que se sientan bien.
Me dijo que quiere verlos siempre sonreír.
Disse que queria vê-los sorrindo.