Having recently graduated from the university, athletic young Hibiki Amawa is eager to begin his career as a gym teacher. But prestigious Seitow Sannomiya Junior High employs only female instructors. Enraged at the sexist attitude of the battle-ax principal (and desperate to pay the rent to the gun-toting landlady who threatens to cook his dog), Hibiki dresses up as a woman and lands the job. Predictably, he turns out to be a good if unconventional teacher who wins the affection of his recalcitrant students. The klutzy Fuko even finds herself developing a puzzling crush on the new gym teacher.