When Tokyo establishes Tokyo Butei High to combat rising crime, Kinji Tooyama, a reclusive former combat-focused student, navigates life at the academy after concealing his embarrassing yet potent talent. His tranquility shatters when targeted by the notorious 'Butei Killer.' Saved by the bold and elite Aria Holmes Kanzaki, Kinji is thrust into a whirlwind partnership as she recognizes his untapped potential.