by Yuki Midorikawa, 189 pages
Natsume understandably freaks out a little when a small rock with a face on it starts following him around...and taking over the bodies of people around him. Later, he runs into an uncomfortably familiar masked yokai. Is Natsume's new family in danger?! Not if the spiritually-sighted young man and his cranky, tubby calico have anything to say about it!
Aw, I love it when Nyanko-sensei gets fed up with yokai who push Natsume's limits and takes care of things himself. He's far too proud to ever say so like he means it, but he's such a devoted kitty. Yay! And we get to see how Natsume came to live with the Fujiwaras. Sweetness.