Derived from the Japanese manga "Natsume's Book of Friends", it mainly talks about Natsume Takashi's daily life.
The story tells the story of Natsume Reiko, a woman who was alienated from humans because she could see monsters. In order to pass the lonely days, she challenged the monsters and wrote the names of the monsters who were defeated by her on a contract as evidence that the monsters became her subordinates.
Reiko's grandson Natsume Takashi received the "Book of Friends" made from those contracts, and inherited Reiko's power to see non-human creatures that would not appear in front of people. And like Reiko, she became a person who was alienated by the people around her. However, as the only one who inherited Reiko's bloodline, he made an important decision: to return the names of the monsters that Reiko had taken away one by one. On the way, Natsume Takashi got to know the great monster Madara, the gentle Fujiwara couple, the mysterious monster slayer Shiba Jingsi, the thoughtful monster slayer named Monday, the enthusiastic intermediate monsters, and the proficient in spells...