After having to repeat his final year in Tsurugamine High School, Kotaro is drawn to Judo through the encounters he make with first-year students Kumi Mifune, Sanshiro Saigo and Daigo Daigo. Having lost to Kotaro, first-year Judoka Kumi Mifune endured to learn the Karate discipline in order to defeat Kotaro. However, the ambitious delinquent Judoka...