Shusaku Nanbu arrives in Kanazawa from Noto to live the bunkara lifestyle. He immediately rescues a beautiful girl, Tomoko Yajima, who was about to be kidnapped by a motorcycle gang, and falls in love with her at first sight when she shows him to Seiun Dormitory, where students from other prefectures have entered. He, along with fellow newcomers Shimowaki and Ichimaru, are baptized at a welcome party by the older students in the dormitory, but Nanbu beats them all to a pulp. He enters Seisonkaku High School, which has become a den of bad guys, and joins the four demons of Seisonkaku (a group of gang leaders; refers to Ryuuzaki no Hiryuu-tai, Torada no Byakkotai, Kumazawa no Higumatai, and Seiun Ryou no Juumonji no Gaijin Butai) show no signs of backing down, and are enthusiastically recruited by the various sports clubs. However, Nambu was begged by Tawashihige, an alumnus of the school who was staying in a remote dormitory, to start the "Shouwa Baka Hayashi" in the defunct cheering section.