Bagi, the Monster of Mighty Nature

Yearning to get along with others and not be disliked, first-year high school student Hiiragi finds himself unable to say no whenever someone requests something of him. One summer day, while unsuccessfully carrying out yet another request, he encounters an oni girl named Tsumugi, who has come to the human world to search for her mother. She does whatever she pleases and is the complete opposite of Hiiragi. Snow mysteriously begins to fall... and their adventure begins.

When Kyuuta, a young orphan living on the streets of Shibuya, stumbles into a fantastic world of beasts, he’s taken in by Kumatetsu, a gruff, rough-around-the-edges warrior beast who’s been searching for the perfect apprentice. Despite their constant bickering, Kyuuta and Kumatetsu begin training together and slowly form a bond as surrogate father and son. But when a deep darkness threatens to throw the human and beast worlds into chaos, the strong bond between this unlikely pair will be put to the ultimate test—a final showdown that will only be won if the two can finally work together using all of their combined strength and courage.

Born in the bitter cold of the Ouu Mountains as the son of Riki, the mightiest bear-hunting dog, is the magnificent tiger-striped puppy, Gin! To defeat the murderous Akakabuto—who seeks to build a stronghold deep in the mountains of Ou after defeating his grandfather and father—Gin joins the Ouu Army, his youthful blood boiling with determination!! With only three months left until the final showdown with Akakabuto, his eyes are set on finding true “men” who will fight alongside his comrades to the bitter end against Akakabuto, as he races across the entire land of Japan!!

After Shijin's concern on the absence of his girlfriend Nagisa, Gamba, Bobo, Gakusha, Ikasama, Shijin, and Yoisho travel to the South Island looking for her, only to find out about a family of Japanese otters, endangered by a wild dog named Black. When Chuta, a badly injured mouse, staggers off a ship in Tokyo Harbor, he bumps into out-of-towners Gamba and Bobo, who are at a party being given by Yoisho, the sailor-mouse. Chuta tells the local mice that he has escaped from Devil's Island, where Norio the evil ermine has crushed the mice with his reign of terror.