The story focuses on Kenichi Shirahama (Shirahama Kenichi), an average 15 year-old weakling, whose life is upended with the appearance of the naive, beautiful, and strong transfer student, Miu Furinji. After Kenichi witnesses Miu's skills in martial arts, he joins the Ryozanpaku dojo, a gathering place of those who are truly strong, which coincidentally also hapens to be Miu's home.