Serving as the direct prequel to the film 'HiGH&LOW THE WORST', this series focuses on the daily lives and internal dynamics of the students at Oya High School. It explores the transition of power and the evolving relationships between the school's leaders and the incoming freshmen, setting the stage for the intense rivalry between Oya High and the delinquents of Housen Academy. The narrative centers on Fujio Hanaoka and Tsukasa Takagi as they navigate the hierarchy of the school's 'Full-Time' system. Through a series of vignettes and character-driven conflicts, the show highlights the brotherhood, loyalty, and brutal combat that define the HiGH&LOW universe, providing essential context for the characters' motivations and the school's reputation as a den of delinquents.