Natsume's Book of Friends Season 2 Episode 1 English Dubbed
Stolen Book Of Friends
Natsume is attacked by a yokai while retrieving a ball at school. In his haste to run away, he ends up breaking a yokai's seal, similar to how he met Nyanko-sensei. Later that night, Natsume discovers a black lookalike of Nyanko-sensei, only to have him steal the Book Of Friends!