Aria the Scarlet Ammo

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 Among them is Kinji Tooyama, a withdrawn former student of the Assault Division who dropped out and now hides his powerful but shameful ability behind a quiet life studying logistics.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