The second season of Natsume Yuujinchou. 
As with its prequel, Zoku Natsume Yuujinchou is about Natsume Takashi, a boy who has had the ability to see youkai since he was young, and his bodyguard youkai, Madara, nicknamed Nyanko-sensei. Natsume attempts to return names written in his Book of Friends, which he inherited from his grandmother Reiko, to youkai in his village. Throughout these adventures, he meets some youkai that are friendly, some that want to steal the Book of Friends, and some that want to kill him. Natsume learns about himself and his relationship with youkai along the way. 
(Source: MAL Rewrite)

Agent: Mausu Promotion  Company: Gadget Link Corporation  Hobbies: karaoke, music, film festivals, video editing, wine tastings  Ryusaku Chijiwa has provided nameless, random background characters for the following anime:  009-1 (Bodyguard B, Soldier A, Spy) Bleach (Shinigami) Chrome Shelled Regios (16th Platoon member) Hellsing OAV (old tourist) Hidamari Sketch (male student) Naruto Shippuuden (Palace Guard) Project Blue Earth SOS (Pilot B) Story of Saiunkoku (Seikintou man) Suteki Tantei Labyrinth (Male student, Section chief) Tayutama -Kiss on my Deity- (Air traffic controller, Newscaster, Policeman, Security guard, snake man) Vampire Knight (Gatekeeper) White Album (TV announcer)

When Reiko was Takashi's age, she bound the names of demons and spirits in her Book of Friends, enslaving them to her capricious whim. Now Takashi is the owner of the book, and the creatures will do anything to get their names back.
 
(Source: Viz Media)

Karime