Natsume receives a letter from Matoba, an exorcist whom he's had unpleasant dealings with in the past. The world of exorcists is a dangerous place lately, and Matoba wants Natsume's help. Natsume wants to refuse, but Matoba threatens to reveal Natsume's powers to his adopted family, which would spell the end of his peaceful life.
For instance, techniques that show youkai 
to people who can't normally see them.
Por ejemplo, no usar técnicas para
mostrar youkai a la gente que no los ve.
Por exemplo, técnicas que mostram youkais
a quem não consegue vê-los.