A mountain kid with zero social programming walks into high school and becomes exactly what he is: a force of nature nobody knows how to stop. Teppei doesn't learn to fit in, he just gets so good at what he does that the school has to build itself around him instead. By the time you realize this show is really about a feral kid learning what discipline actually means, he's already changed everyone around him.

Teppei grew up in the mountains, raised by his father, and he is a lively boy as hardy as a weed who lives with total freedom. Everything changes when he enrolls in high school, the first school he has ever attended. His odd behavior makes him a steady source of trouble, but his sporting ability soon gets noticed, above all in kendo, the Japanese art of swordsmanship. Before long he becomes the hero of his school. The action sports story comes from a manga by Chiba Tetsuya.