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 Fūrinji. After Kenichi witnesses Miu's skills in martial arts, he joins the Ryōzanpaku dojo, a gathering place of those who are truly strong, which coincidentally also happens to be Miu's home.