As a young boy, Kenichi Kokuho got lost in the mountains and was never found. Unbeknownst to everyone, however, Kenichi was raised in the wilderness by his foster father. When Kenichi turns 15, his foster father reveals the truth about his origins. Upon learning this, Kenichi decides to head into civilized society, where his biological parents live.
Everything Kenichi encounters in town fills him with surprise and wonder. His family is overjoyed to see their son alive, but shocked to find he has grown up wild and unlike other children. Now, his new life is about to start.
His feral behavior and physical strength cause numerous troubles around town. Kenichi has his own way of handling situations, but it is so different that most people cannot understand what he is up to. Can he adapt to life in the town?