Title: Natsume's Book of Friends
Japanese Title: 夏目友人帳
Edition: Kindle, Paperback, Hardcover
Author(s): Midorikawa, Yuki
Takashi Natsume is a 15-year-old boy who wants nothing more than to live a normal life like everyone else. But to his dismay, like his deceased grandmother, Reiko, he possesses the ability to see "youkai," or spirits. Natsume eventually discovers that Reiko had bequeathed to him a book of contracts in which she had bound youkai—the "Book of Friends." However, since Reiko never called upon the spirits' names, they have been left in a confined state. Now, these spirits continuously pursue Natsume in the hopes of having their contracts dissolved for freedom.
While there may be gentle, harmless spirits that come to Natsume for help, there are also malicious, hostile spirits that threaten him. This is where Madara steps in, a spirit disguised as a rotund cat. Commonly referred to as Nyanko-sensei by Natsume, Madara is a self-proclaimed bodyguard who has his own motives for accompanying Natsume.