Natsume's Book of Friends, Volume 23 by Yuki Midorikawa

Takashi Natsume has always been aware of the supernatural world, but after he inherits a magical book from his grandmother, the supernatural world is aware of him!

Takashi Natsume can see the spirits and demons that hide from the rest of humanity. He has always been set apart from other people because of his gift, drifting from relative to relative, never fitting in. Now he's a troubled high school student who has come to live in the small town where his grandmother grew up. And there he discovers that he has inherited more than just the Sight from the mysterious Reiko.

Natsume and his friends stumble into a ghostly treasure hunt when they hear about a haunted painting. His friends are eager to investigate, but Natsume suspects it might involve a dangerous yokai. To protect his friends, Natsume goes along with the quest, but the strain of keeping them in the dark is starting to show. Will Natsume ever be able to tell them the truth?