Aria the Scarlet Ammo - S01

To combat rising crime, Japan establishes Tokyo Butei High, an elite school where "Butei"-armed detectives-train to become skilled, justice-driven operatives. Among them is Kinji Tooyama, a withdrawn former student of the Assault Division who now avoids combat, studying logistics to hide his potent but awkward secret ability. His quiet life shatters when he’s targeted by the notorious "Butei Killer" and crosses paths with Aria Holmes Kanzaki, a fiery, top-ranked prodigy. After saving his life and witnessing his true potential, she insists he become her partner, dragging him back into a world he tried to leave behind.