Natsume's Book of Friends (2008)

S2E1 Stolen Book of Friends

While Natsume is reading outside at school, a ball unexpectedly strikes him. He goes to fetch it, inadvertently breaking a Youkai's seal, reminiscent of his earlier encounter with Nyanko-sensei. That night, Natsume and Nyanko-sensei come across a doppelgänger of Nyanko, who quickly snatches the Book of Friends right from under their noses!