Tells of the friendship between John and Ref, an Akita Inu, that John met on one of the trips with Hidetoshi to Africa. 
 
Note: The author, Takahashi Yoshihiro, dedicated this story to the Finnish fans as a thank you for being invited as a honorable guest to the country in 2011.

A giant demon bear named Akakabuto has taken over Futago pass. Shortly after, a silver, tiger-striped Akita pup named Gin is born and is trained as a bear-dog. Gin is brought to Riki (the leader of a large pack of dogs and Gin's father) to join the pack. Riki let's him join after proving his strenght and sends his platoons to all parts of Japan to recruit strong males to fight Akakabuto. Gin, the third generation of bear-dogs goes through many hardships for the purpose of stopping the terrifying bear, Akakabuto. 
(Source: Anime News Network) 
Note: Chapter count reflects the original serialization in Weekly Shounen Jump. The chapters were later combined into 55 chapters for the tankōbon release.

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