When Kenichi Kokuhou was a small boy, he was lost in the mountains and never found. Unknown to anyone, he was actually raised by his foster father in the wilderness. At the age of 15, Kenichi learns the truth about his background from his foster father. Realizing that his parents still live in a civilized society, he decides to leave the wild and return to the town where they reside. Everything Kenichi encounters in the town is filled with surprise and wonder. His family is delighted to see their son alive, yet they are shocked to discover that he has become wild and unlike other children. As his new life begins, Kenichi’s wild attitude and physical toughness create various problems in the town. Kenichi has his own way to handle them.