Natsume's Book of Friends
When I was Deceived
E8 Feb 21, 2013 24m TV-14
Nyanko-sensei falls into a well and discovers that there is a barrier inside it, as well as Nanase, Matoba's assistant. She is looking for a certain stone with a youkai she had sealed in it, and tells Nyanko-sensei the story of how she met the youkai to pass the time.
Where to Watch When I was Deceived