Kenichi Kokuho was a tiny kid who became lost in the mountains and was never discovered. Unbeknownst to anybody, Kenichi was raised in the wilderness by his foster father. When Kenichi reaches the age of 15, his foster father reveals him the truth about his upbringing. Kenichi chooses to travel to a civilized civilization where his parents live after learning the truth. Everything Kenichi encounters in town is a succession of surprises and awe. His family is overjoyed to find their kid alive, but they are astonished because he has turned wild and unlike other youngsters. And now he's set to embark on a new chapter in his life.