In the great outdoors of Hokkaido, a man runs away from a parent bear while holding a bear cub under his arm! Manten Tohashi, 15 years old, is a bad boy who has no idea how much he enjoys everything he does! Manten's talent was discovered by the gym president who happened to be at a boxing camp, and his father, a rancher, forced him to leave home. Using the extraordinary power he cultivated through life-threatening pranks against nature, he aims for a belt in the world of boxing, which he doesn't really want to do... ?