Natsume's Book of Friends manga volume 23 features story and art by Yuki Midorikawa.

Natsume and his friends stumble into a ghostly treasure hunt when they hear a rumor about a haunted painting that has hung in each of the three high schools in the area. Kitamoto and Nishimura are eager to track down the painting as a lark, but Natsume suspects it might involve a dangerous yokai. He joins the quest in case he needs to stage a yokai intervention, but the strain of keeping most of his friends in the dark about his abilities is starting to take a toll. Will Natsume ever be able to tell them the truth about what he sees?